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| 32951. |
Cbse maths compartment pa per 2017 |
| Answer» Check Question Papers here :\xa0https://mycbseguide.com/cbse-question-papers.html | |
| 32952. |
What is congruence |
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Answer» The angle ,the side are equal .They are said to be congruence Congruence means equal to each other |
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| 32953. |
Maths ko kese solve kere or kitna time de |
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Answer» Minimum 1 hour . You have solve maths It is based on your calculation |
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| 32954. |
Maths kese solve kere |
| Answer» Haat or Dimag se.. ??????? | |
| 32955. |
2x+3y=5 |
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Answer» What is the complete question ? ? |
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| 32956. |
CosA÷1+sinA + 1+sinA÷cosA=2secA |
| Answer» ???? Fast please .... | |
| 32957. |
4 men and 6boys can finish a |
| Answer» Let the man finishes the work in x days and that the boy finishes in y days.One day\'s work of a man =\xa0{tex}\\frac{1}{x}{/tex}and one day\'s work of a boy ={tex}\\frac{1}{y}{/tex}Since, 4 men and 6 boys finish a piece of work in 5 days.{tex}\\therefore{/tex}\xa0One day\'s work of 4 men and 6 boys =\xa0{tex}\\frac{1}{5}{/tex} of the work{tex} \\Rightarrow \\frac{4}{x} + \\frac{6}{y} = \\frac{1}{5}{/tex}Similarly, in second case,\xa0One day\'s work of 3 men and 4 boys =\xa0{tex}\\frac{1}{7}{/tex} part of the work{tex}\\therefore \\frac{3}{x} + \\frac{4}{y} = \\frac{1}{7}{/tex}Thus, we have the following equations{tex}\\frac{4}{x} + \\frac{6}{y} = \\frac{1}{5}{/tex}\xa0......(i)and{tex}\\frac{3}{x} + \\frac{4}{y} = \\frac{1}{7}{/tex}\xa0.....(ii)Here , Eqs. (i) and (ii) are not in linear form , so we reduce them in linear form by putting\xa0{tex}\\begin{array}{l}\\frac1x\\;=\\;u\\;and\\;\\frac1y\\;=\\;v\\\\\\end{array}{/tex}Now, Eq. (i) becomes\xa0{tex}4u + 6v = \\frac{1}{5}{/tex} .....(iii)and Eq(ii) becomes\xa0{tex}3u + 4v = \\frac{1}{7}{/tex}\xa0.....(iv)On multiplying Eq(iii) by 3 and Eq(iv) by 4 and then subtract Eq , we get{tex}18v - 16v = \\frac{3}{5} - \\frac{4}{7}{/tex}{tex}\\Rightarrow 2v = \\frac{{21 - 20}}{{35}} \\Rightarrow 2v = \\frac{1}{{35}} \\Rightarrow v = \\frac{1}{{70}}{/tex}Put\xa0{tex}v=\\frac{1}{70}{/tex} in Eq(iv), we get\xa0{tex}3u + \\frac{4}{{70}} = \\frac{1}{7}{/tex}{tex} \\Rightarrow 3u = \\frac{1}{7} - \\frac{4}{{70}}{/tex}{tex} \\Rightarrow 3u = \\frac{6}{{70}}{/tex}{tex} \\Rightarrow u = \\frac{1}{{35}}{/tex}Thus\xa0{tex}u=\\frac{1}{35}{/tex}\xa0and\xa0{tex}v=\\frac{1}{70}{/tex}{tex} \\Rightarrow \\frac{1}{x} = \\frac{1}{{35}}{/tex}and\xa0{tex}\\frac{1}{y} = \\frac{1}{{70}}{/tex}{tex} \\Rightarrow x = 35{/tex}\xa0and\xa0{tex}y=70{/tex}Hence, 1 man alone and 1 boy alone finishes the work in 35 and 70 days, respectively. | |
| 32958. |
If aplha and beta are 2 odd prime number show that a^b^is composite |
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| 32959. |
Solutions of the board exam paper of 2018 for mathematics |
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| 32960. |
Imtegration of 1 by 1 + cotx |
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| 32961. |
13.5+34 |
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Answer» 47.5 47.5 47.5 |
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| 32962. |
3x+4y=10 and 2x-2y=2 solve by elimination method |
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Answer» Step 1: Multiply eq. 1 by 2 and eq. 2 by 3 {to equalise coefficient of x} 6x+8y=20 (eq. 3) 6x-6y= 6. ( eq.4)Step 2: Subtract eq.4 from eq. 3 6x+8y=20 6x-6y=6 -. +. - -------------------- 14y = 14 y=1Step 3:Find x by substitution method x= 6+6y/6. =. 1 + y. =. 1+1 x =2 3x+4y=10 (i)2x-2y=2 (ii)Multiply eqn (i) by\xa02 and eqn (ii) by 3\xa0We get,6x+8y=20 - (iii)6x-6y=6 - (iv)Now solving eqn(iii) and (iv) we get 14y = 14 i.e\xa0y=1Substituting y=1 in eqn (i) we get 3x=6 i. e. x=2\xa0 |
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| 32963. |
What is cosec (theta)=?What is sec (theta)=? |
| Answer» Cosec (theta)=1/sin (theta)Sec (theta)=1/cos (theta) | |
| 32964. |
What is composite number ? Give exanple |
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Answer» Thanks coprime and composit is confusing The number having more than two factor is called composite number. Eg 4,8,9,25,12 Which has more tha 2 factors i.e., one and the number itself4 is the smallest composite number. |
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| 32965. |
How to use cross multiplication method |
| Answer» Simple, b1/b2, c1/c2, a1/a2, b1/b2. Now put the value | |
| 32966. |
If Alpa and beta at |
| Answer» Pls write your complete qus... | |
| 32967. |
Find second term of an AP whose sum of n terms of an AP is given by Sn = 2nsqaure +2 |
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| 32968. |
If d is the HCF of 56 and 72, then find the value of x and y satisfying d= 56x + 72y |
| Answer» I don\'t know | |
| 32969. |
Marketing questions |
| Answer» | |
| 32970. |
Sin30 +cos30 |
| Answer» Root (3 +1)/2 | |
| 32971. |
Plzzz tell me the method of COMPLETING THE SQUARE. Of chapter 4 - quadratic equations. |
| Answer» It means do the half of the cofficient of x and then square of this no. After it add this no. On both sides of the eqn. | |
| 32972. |
Formula for chapter 8 introduction on trigonometry |
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| 32973. |
Measure of angleA+B=130 Measure of angle B+C=125 find measure of angle Q |
| Answer» Q will be 125 degree | |
| 32974. |
sin0\'= |
| Answer» P/H | |
| 32975. |
If sec thita +tan thita =√3 than prove that tan thita =1/√3 |
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| 32976. |
Chapter 4 important questions |
| Answer» Terminating | |
| 32977. |
5/1600 is terminating or non terminating |
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Answer» Terminating Terminating because it ends with 0 and 5. It is terminating |
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| 32978. |
Example 17 |
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| 32979. |
Is (mean median mode ) chapter has been omitted from the syllabus?? |
| Answer» I don\'t think | |
| 32980. |
49^4=7 ^a, find the value of a |
| Answer» 49^4=7^a.= (7^2)^4=7^a=7^8=7^aNow we will cancel the base 7 wich is in both side. Now,=7^8=7^a =8=a A=8. Ans | |
| 32981. |
what do you mean by linear |
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Answer» Linear means x exponent 1 in polynomails Linear means in a line Linear means 1 ans the linear eqn means ax\'2+bx+c=0 Linear means single i.e, 1. That no.s which are powered by 1 |
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| 32982. |
show that one and only one out of n,n+1 and n+2 is divisible by where n isany positive integer |
| Answer» On dividing n by 3, let q be the quotient and r be the remainder.Then, {tex}n = 3q + r{/tex}, where {tex}0 \\leq r < 3{/tex}{tex}\\Rightarrow\\;n = 3q + r{/tex} , where r = 0,1 or 2{tex}\\Rightarrow{/tex}{tex}n = 3q \\;or \\;n = (3q + 1) \\;or\\; n = (3q + 2){/tex}.Case I If n = 3q then n is clearly divisible by 3.Case II If\xa0{tex}\\;n = (3q + 1)\\; {/tex} then {tex} (n + 2)= (3q + 1 + 2) = (3q + 3) = 3(q + 1){/tex}, which is clearly divisible by 3.In this case, {tex}(n + 2){/tex} is divisible by 3.Case III If n = {tex}(3q + 2){/tex} then {tex}(n + 1) = (3q + 2 + 1) = (3q + 3) = 3(q + 1){/tex}, which is clearly divisible by 3.In this case,{tex} (n + 1){/tex} is divisible by 3.Hence, one and only one out of {tex}n, (n + 1){/tex} and {tex}(n + 2){/tex} is divisible by 3. | |
| 32983. |
The radius is always perpendicular to the radius at the point of contact |
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Answer» Given A radius OP of a circle C (O, r) and a line APB, perpendicular to OP.To Prove AB is a tangent to the circle at the point P.PROOF Take a point Q, different from P, on the line AB.since radius through the point of contact of tangent is perpendicular to it. Therefore,\xa0{tex} O P \\perp A B{/tex}.{tex}{/tex}We know that among all the line segments joining O to a point on AB, OP is the shortest one. Therefore,{tex}{/tex}\xa0OP <\xa0 |
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| 32984. |
what is number what is number |
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| 32985. |
Solve this linear equation by substitution method. x+y=14x-y=14. |
| Answer» X=14 Y= 0 | |
| 32986. |
what is trignometri |
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Answer» Tri=threeGon=sideMetric is refer to metronMetron=measurementTrigonometric mean three sides measurement it is a branch of mathematics which deals with measure of angle and triangle Trignometry is the branch of mathmatics dealings with the sides and angles of a triangle |
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| 32987. |
Find the sum of the first positive integers divisible of by 6 |
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| 32988. |
Is there anyone who is in kv afs yelahanka Bangalore |
| Answer» Don\'t use this app for chatting or for finding friends | |
| 32989. |
Prove that 3√6 is not a irrational number |
| Answer» The give question is wrong .Because 3√6 is a irrational number so how can we prove that it is not a irrational number.So think before asking any question. | |
| 32990. |
How i change 132 minutes into hours |
| Answer» Divide it by 60 | |
| 32991. |
If an AP 7 times the 7th term is equal to11 times the 11th term.Find the 18th term of an AP |
| Answer» 18 times 18th term | |
| 32992. |
How to find mean using step deviation method but class interval is different?? |
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Answer» ? you should find ans in wikpedia\xa0 |
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| 32993. |
Let ∆ABC~∆DEF and their areas be, respectively, 64cm² and 121cm². If EF= 15.4cm,find BC. |
| Answer» {tex}\\vartriangle {/tex} ABC {tex} \\sim {/tex}{tex}\\vartriangle {/tex}\xa0DEF ...............Given{tex}\\therefore {/tex}{tex}{{ar(\\Delta ABC)} \\over {ar(\\Delta DEF)}} = {\\left( {{{BC} \\over {EF}}} \\right)^2}{/tex} ..........[The ratio of the area of two similar triangles is equal to the square of the ratio of their corresponding sides]{tex}\\Rightarrow {/tex}{tex}\\frac{{64}}{{121}} = {\\left( {\\frac{{BC}}{{15.4}}} \\right)^2} \\Rightarrow {\\left( {\\frac{8}{{11}}} \\right)^2} = {\\left( {\\frac{{BC}}{{15.4}}} \\right)^2}{/tex}{tex}\\Rightarrow {/tex}{tex}\\frac{8}{{11}} = \\frac{{BC}}{{15.4}}{/tex} ...........Taking square root on both sides{tex}\\Rightarrow {/tex} BC={tex}\\frac{{8 \\times 15.4}}{{11}} \\Rightarrow BC = 11.2\\,cm{/tex} | |
| 32994. |
Qhen rhe polynomial (kx3-ax2+4x-a) is divided by (x-a) what will be remainder and quotient |
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| 32995. |
How we can find alpha and beta |
| Answer» Just do middle term split of the polynomial and u will find two zeroes.those zeroes are alpha anfmd beta | |
| 32996. |
For which value of a and b the equation have infinite solution:2x+3y=7(a-b)x+(a+b)y=3a+b-2 |
| Answer» Hi YugYOU CAN GET THE SOLUTION ON ncerthelp.blogspot.com And On google chrome | |
| 32997. |
X-7y=-42X+3y=6 |
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Answer» X=4.3 Do by elimation method that is quite easy and you will get the value for y as 4.8 and substute in any equation to get the value for x X- 7y=-42X+3y=6- - --------------- -10y=-48-------------- y = 4.8 Sub in any equation u will get the value for x |
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| 32998. |
Syllebus |
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Answer» yes You can get it in this app |
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| 32999. |
What is the formula of Sin(A+B) ? |
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Answer» Let a&b is 3&5 respectively It depends on what are the value given for a and b |
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| 33000. |
2x+5y how much |
| Answer» | |