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8401.

Graph of 3 lines

Answer»
8402.

The mid point of the sides of triangle are (1,5, -1) ,(0,4,-2) and (2,3,4). Find its vertices

Answer»
8403.

solve 2cos^2x +3sinx=0

Answer»
8404.

Wat is passing marks in maths from 100 marks paper

Answer» 33
33 marks
Around 40%
8405.

Solve:- cos3x +cosx -cos2x=0

Answer»
8406.

Multiplicative inverse of 4 minus root 5

Answer»
8407.

Find the term independent of the x ( √x/3-3/2x²)*10

Answer»
8408.

prove that B-A=A\'-B\'

Answer» {tex}L.H.S.=A\'−B\'If U is universal set, then A\'=U−A and B\'=U−B⇒L.H.S.=(U−A)−(U−B)=U−A−U+B=B−A=R.H.S. (Hence Proved){/tex}
8409.

Sin15°

Answer» Sin15° = Sin ( 45 - 30 ) {{Now ... we know that , Sin ( A + B ) = SinA Cos B + Cos A sin B }}Thus , Sin 15° = Sin45 Cos 30 + Sin30 Cos 45 => after putting values we will get :: root3+ 1 / 2 root 2
8410.

Prove that:- acosA+bcosB+ccosC=2asinBsinC

Answer»
8411.

Sin10sin30sin50sin70 equals to 1/16

Answer» In these type of questions , firstly multiply and divide the term by 2 and then use:: 2 SinA SinB = Cos(A +B ) - Cos ( A-B ) type identities . And then took common terms outside and then again use above identities ... you will get your answer . Its quit tough to solve the whole question over there. thus, I have told you the procedure .. I hope it will help you ...?
Jai ho dada prashuram ji ki ....
8412.

f(x)=3x+1f(gx)=x-2Find gx

Answer» 3x -5
8413.

Prov that tan4x=4tanx(1-tan²x) /(1-6tan2

Answer» tan4x=2 tan 2x/1-tan^2 2xNow at both again put identity of 2x u will get the answer
8414.

Find the derivative of e^√x using 1st principal

Answer» Solve it bro
{e^(√x+h)-e^h}/he^√x{e^h-1}/he^√x
8415.

Derivative of 1+Sin X /1-sin x

Answer» 0+cosx/(1-sinx)^2
8416.

prove by law of algebra (A union B) union (A union B\') = A

Answer»
8417.

How to find out quadrant of negative theta values

Answer» Pie-theta
8418.

Prove by PMI :-n(n+1)(n+2)(n+3) is multiple of 24

Answer» For n=11(1+1)(1+2)(1+3)=1(2)(3)(4)=24For P(1) it is true.Let us assumes that it is true for n=kNow,P(k)=k(k+1)(k+2)(k+3)=24x(k+1)(k+2)(k+3)=24x/k.....(1)Now for P(k+1)=(k+1)(k+2)(k+3)(k+4)=24[x(k+4)/k]Therefore, it is true for n=k+1Thus by PMI, it is true for all n belongs to N
8419.

Can anybody tell maths sample paper of 2019

Answer» Oswaal papers r best u should definitely try it
Arihant
8420.

Find the square root of the complex number: z= -15 - 8i

Answer»
8421.

Sina + sinb

Answer» 2sin(a+b)/2×cos(a-b)/2
8422.

Find domain and range of y=1/4-x²

Answer» Domain not equal to -2 &2
Domain=R-{2}
8423.

If A=1 2 3 4 5 6 , B=2,4 ,6,8 find A-B

Answer» A-B ka mtlb h a but not b .a toh diya h bnot nikal lo B\'=1,3,5.so A-B=1,3,5 hoga
8 will not come becoz...here is talking about A-B......Not ....B-A....hope u understand
Will 8 come or not and why
1,3,5
8424.

Cos20cos40cos60cos80=1/16

Answer»
8425.

What is the general solution of the equation 5cos^[email\xa0protected] +7sin^2 - 6 = 0

Answer»
8426.

Last minute tips?

Answer» have a fun ,play games and see ncert revising videos on youtube
Neat and clean paper or don\'t left/Drop any question & all the best
8427.

Prove that tan(45+x)=sec2x+tan2x

Answer» LHS = Tan(45° + x )=(Tan45° +Tan45°)/(1-Tanx.Tan45°)=(Tanx + 1)/( 1- Tanx )=( Sinx/cosx + 1)./( 1- sinx/cosx)=(sinx + cosx )/(cosx - sinx)=(sinx +cosx )(cosx - sinx)/(cosx -sinx)²=(sin²x -cos²x)/(1-sin2x)=cos2x/(sin2x -1)=1/(sin2x - 1)/cos2x=1/(tan2x - sec2x )=(tan2x + sec2x )= RHS
Put the formulaa
8428.

Sin(x+y)/sin(x-y)=a+b/a-b,show that tan x/tan y=a/b

Answer» (sin(x+y) +sin(x-y)) /(sin(x+y)-sin(x-y)) =(a+b+a-b) /(a+b-a+b) By using componando & dividendo 2sinx.cosy/2cosx.siny=a/b Sinx.cosy/cosx. siny =a/bTanx/tany=a/b
8429.

Derivative of (1-sin2x)/cosx with respect to x

Answer»
8430.

Find the squre roots of the following

Answer» 2 i
8431.

Find the 20th term from the last term of AP 3,8,13,.........253

Answer» 158 hai 20 term
First reverse the A.P n then find 20th from beginning.
8432.

Find the number of arrangements

Answer» 453600
10!/2!X 2!
Chandigarh
Complete ur question
8433.

Convert 40°20\' into radian measure

Answer» 40 degrees 20 minutes1 degree = 60 minutes\xa01 degree = 60\'⇒ 40 degree 20\'⇒ 40 degree + 20\'⇒ 40° + 20°/60⇒ 40° + 1°/3\xa0⇒ (120 + 1)°/3⇒ 121°/3We know that Radian measure =\xa0π*degree measure/180⇒ (22*121)/(7*180*3)⇒ 2662/3780= 0.704 radians
8434.

f(x)=cosx/1+sinx f\'(x)=?

Answer»
8435.

Sin18°=?

Answer» Let A = 18° Therefore, 5A = 90° ⇒ 2A + 3A = 90˚⇒ 2θ = 90˚ - 3ATaking sine on both sides, we get sin 2A = sin (90˚ - 3A) = cos 3A ⇒ 2 sin A cos A = 4 cos^3 A - 3 cos A⇒ 2 sin A cos A - 4 cos^3A + 3 cos A = 0 ⇒ cos A (2 sin A - 4 cos^2 A + 3) = 0 Dividing both sides by cos A = cos 18˚ ≠ 0, we get⇒ 2 sin θ - 4 (1 - sin^2 A) + 3 = 0⇒ 4 sin^2 A + 2 sin A - 1 = 0, which is a quadratic in sin ATherefore, sin θ = −2±−4(4)(−1)√2(4)⇒ sin θ = −2±4+16√8⇒ sin θ = −2±25√8⇒ sin θ = −1±√5/4Now sin 18° is positive, as 18° lies in first quadrant.Therefore, sin 18° = sin A = −1±√5/4
8436.

f(x)=cos(x-π/16) find derivative

Answer» f\'(x)=d/dx[cos(x-pi/16)]=-sin(x-pi/16){d/dx(x-pi/16)}=-sin(x-pi/16){1-0}=-sin(x-pi/16).......ANS
8437.

If is smaller than right the length of the latest rectum of the ellipse

Answer»
8438.

write the domain of the following function :f(x)= 1/√(x+1)(2x-5)

Answer» Domain can only be 3 or more than 3
Use wavy curve method
koi answer krdo...??
8439.

how many square tiles of side 40 cm needed to build length 29 m and breadth 6 m

Answer» Total needed area=l*b =29*6=174m sq.Change it into cm=174*100=17400cm sq.Now find the area of square tile=40*40=1600cm sq.Total square tiles needed=17400/1600 =10.87ans.
8440.

Lim x-0 (e^x^3)-1/sin^3x

Answer»
8441.

Domain and range of f (x)=x2 (here x is square)

Answer» Domain is all real numbers. Range is R+ U {0}
x€R, y€R
8442.

What is the rankof MOTHER in dictionary?

Answer»
8443.

z=i-1/ 1/2+3/2i

Answer» 1
8444.

SinA/cos3A+sin3A/cos9A+sin9A/cos27A=1/2[tan27A-tanA]

Answer»
8445.

Prove that Tan15°+Cot15°=4

Answer» Tan(45-30)=tan45-tan30/1+tan45.tan30=(1-1/root 3)/(1+1/root 3)=root 3-1/root 3+1. .......1 similarly,cot(45-30)=root 3+1/root3-1. ........2Now by adding 1&2 we get 4
8446.

what is the derivative of sinxcosx

Answer» Cos2x - sin2x
8447.

Difference between average and percentage?

Answer» A percentage is a dimensionless number (pure number). In colloquial language, an average is a single number taken as representative of a list of numbers. Often "average" refers to the arithmetic mean, the sum of the numbers divided by how many numbers are being averaged.
8448.

Tan x

Answer» Sin x/cos x
8449.

Find derivative of tanz by first principal

Answer» As lim= tan(x+h)-tan(x)/hh->0 = multiply and divide by1+tanxtan(x+h) =tan(x+h)-tanx. 1+tan(x+h)tanx --------------------- ---------------------- . 1+tanxtan(x+h). h= tan(x+h-x). 1+tan(x+h)tanx -------------------------------------------- h= tanh. 1+ tan(x+h)tanx ------------------------------------- hAs tanh/h=1 = 1+tan(x+h)tanxPut h=O =1+tan^2x= sec^2x
8450.

What is angke

Answer»