Explore topic-wise InterviewSolutions in Class 11.

This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your Class 11 knowledge and support exam preparation. Choose a topic below to get started.

251.

Evaluate Cos930

Answer»
252.

√3-1/√3+1=2-√3= how??Pls help

Answer» By rationalising..(√3-1/√3+1)×(√3-1/√3-1) = (√3-1)²/(√3)²-(1)²[(a+b)(a-b)=a²-b²]= (3+1-2√3)/2 [(a-b)²=a²+b²-2ab]= (4-2√3)/2= 2(2-√3)/2= 2-√3= RHS
253.

Calculate the arithmetic mean of a,a+d,a+2d,........a+(n+1)d

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254.

If z and z1 are complex no. Such that 2z/3z1 is purely imaginary then prove that!z-z1/z+z1!=1

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255.

Write the following (1-2) as complex number 1: √_27

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256.

if a b c are any three sets then a-(buc) is equal to

Answer» Jjddkd<br>Let x be any element of A - (B ∩ C). Then, x ∈ A - (B ∩ C)⇒ x ∈ A and x ∉ (B ∩ C)⇒ x ∈ A and x ∉ (B ∩ C)⇒ x ∈ A and (x ∉ B or x ∉ C)⇒ x ∈ A and x ∉ (B ∩ C)⇒ x ∈ A and (x ∉ B or x ∉ C)⇒ (x ∈ A and x ∉ B) or (x ∈ A and x ∉ C)⇒ x ∈ A and x ∉ (B ∩ C)⇒ x ∈ A and (x ∉ B or x ∉ C)⇒ (x ∈ A and x ∉ B) or (x ∈ A and x ∉ C)⇒ x ∈ (A - B) or x ∈ (A - C)⇒ x ∈ A and x ∉ (B ∩ C)⇒ x ∈ A and (x ∉ B or x ∉ C)⇒ (x ∈ A and x ∉ B) or (x ∈ A and x ∉ C)⇒ x ∈ (A - B) or x ∈ (A - C)⇒ x ∈ (A - B) ∪ x ∈ (A - C)⇒ x ∈ A and x ∉ (B ∩ C)⇒ x ∈ A and (x ∉ B or x ∉ C)⇒ (x ∈ A and x ∉ B) or (x ∈ A and x ∉ C)⇒ x ∈ (A - B) or x ∈ (A - C)⇒ x ∈ (A - B) ∪ x ∈ (A - C)∴ A - (B ∩ C) ⊆ (A - B) ∪ (A - C)⇒ x ∈ A and x ∉ (B ∩ C)⇒ x ∈ A and (x ∉ B or x ∉ C)⇒ (x ∈ A and x ∉ B) or (x ∈ A and x ∉ C)⇒ x ∈ (A - B) or x ∈ (A - C)⇒ x ∈ (A - B) ∪ x ∈ (A - C)∴ A - (B ∩ C) ⊆ (A - B) ∪ (A - C)Similarly, (A - B) ∪ (A - C) ⊆ A - (B ∩ C)⇒ x ∈ A and x ∉ (B ∩ C)⇒ x ∈ A and (x ∉ B or x ∉ C)⇒ (x ∈ A and x ∉ B) or (x ∈ A and x ∉ C)⇒ x ∈ (A - B) or x ∈ (A - C)⇒ x ∈ (A - B) ∪ x ∈ (A - C)∴ A - (B ∩ C) ⊆ (A - B) ∪ (A - C)Similarly, (A - B) ∪ (A - C) ⊆ A - (B ∩ C)Hence, A - (B ∩ C) = (A - B) ∪ (A - C)Step-by-step explanation:HOPE THIS WILL HELP YOUTHANKS?
257.

What are the subsets of the set A={phi,1}?

Answer» Subsets - (phi), (1), (phi,1)<br>Subsets--- A (phi) and A (1)
258.

X ki power 135 + X ki power 135 =4X ki power 135 + X ki power 135 = ?

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259.

Angle made by y=1/√3x+2 with +ve x axis is

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260.

Ex=3.2

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261.

Why we dont use the word radian after pi

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262.

what is the use of construction and tangent in our day to day life ??

Answer» It is used<br>Nothing
263.

log4.log3.log2x=0

Answer» x=8
264.

Range of f(x) = x² -1

Answer» (-1, infinite)<br>[-1, ♾️)
265.

Domain of f (x)=7

Answer» Is alway 7 because they are not contain any variable only constant they contain so Answer is 7
266.

Find the range of 1/1- x²?

Answer» Range (-ve infinity,0) union 1 to infinity<br>Thanks for the answer but Could u please tell that how to calculate the range of this question.<br>Domain = R- {-1,1}Range = (0,1]<br>But I have asked the range<br>Domain of this question is R - {1,-1}.
267.

What is open and closed intervals? Explain ..

Answer» An open interval does not include its endpoints and is indicated with parentheses. For example, (0,1) describes an interval greater than 0 and less than 1. A closed interval includes its endpoints and is denoted with square brackets rather than parentheses.<br>Open interval : (2,3) ; end point not includeClosed interval : [4,5] ; end point include
268.

Prove that A is subset of empty set implies A= empty set .

Answer» Because every set have a sub set called empty set which is denoted by (fie).
269.

5tan2

Answer» 10.9251993163 is the answer
270.

cos15 - sin 15

Answer» Write it as cos (45-30) - sin(45-30)Now open both the functions as\xa0= cos 45 cos 30 + sin 45 sin 30 - sin 45 cos 30 + sin 30 cos 45Putting the values as learned in class X{tex}{1\\over \\sqrt2} *{\\sqrt3\\over2} +{1\\over \\sqrt2} *{1\\over2} - {1\\over \\sqrt2} *{\\sqrt3\\over2} +{1\\over2} *{1\\over \\sqrt2} {/tex}Solving we get= {tex}1\\over\\sqrt2{/tex}Answer.\xa0\xa0\xa0
271.

If r is symmetric relation on set A ,then write a relation between R and R complement

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272.

If R is the set of all real numbers , what do the Cartesian product RxR and RxRxR represent ?

Answer» Parallel to y axis
273.

Kon kon 11 ka new student hai

Answer» 8<br>I am?<br>Mai<br>I am also☺️☺️<br>Mai hu??
274.

Byiknu

Answer» Biknu
275.

If a and b are natural no such that (1/a)^1/b=0•3 bar then the value of ab can be _____

Answer» 3
276.

If the sum of the digits of a no (10^n-1)is 4707 where n is a natural no then the value of n is

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277.

Value of sin 175

Answer» Good evening .. mai thik hu tum kaise ho ? Ha abhi bas online hi chal rhi h tumhara bhi toh online hi hoga na ... class 11 ? kya hi bolun mai last ke 1 month ok pata chala k annual exams honge aur phle course complete the but fr v last 1 month bhut pdhna pda qki revise nhi ki thi aur last exam vle din bol rhe h k tum logo ka result nhi aayega? . Tumhara kaisa rha ?? Qsn drop krlena ek naya vla ok<br>Good evening....kaise ho? Abhi to online hi class chal rahi hogi ........waise class 11 kaisa raha??????<br>Patna me bhi bahot halat kharab hai....<br>Arey yaar bhut corona h isiliye mai ghar aagyi hu..80% bhubaneswar se hi h toh socha tum logo se ek baar mil v lu<br>Glad to see you back but abhi to class 12 start hui hai....khatam kaha hua?
278.

cos 765°

Answer» cos 765=\xa0cos (765 - 360)= cos (405)= cos (405 - 360)= cos (45)= (sqrt2)/2
279.

Write the range of the function f(x) = sin [x] , where -π/4 ≤ x ≤ π/4

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280.

If A = {2,3,4}, then what is P(A)

Answer» Add null set to the top answer<br>(2),(3),(4,),(2,3),(3,4),(2,4),(2,3,4)
281.

Send me all formulæ of lesson 15.please.?\u200d♂️✍

Answer» Baki sab ka kya hal hai?? Koi ata hai ki nahi.....<br>Badhiya hu bhai....aree yarr pahle hamko laga ki exam nahi dena padega 11 ka ...but jab pata chala ki dena hi hai....to serious hogaya padhai me....? ...<br>Hii bro ....kaise ho ..? Itte tym se kahaan the ...?<br>Hello seraj...how r u<br>Hlo
282.

Find the common ratio of gp √7,√21,3√7...

Answer» √3<br>√3<br>Root 3<br>3
283.

Guy\'s final exam kab se hai. In delhi??.

Answer» 3 May
284.

fill in the blank 1×2×3×4......110×111=......

Answer» 1.76295255E+180
285.

differentiate x^n logxe^x with respect to x

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286.

evaluate lim x→0 roota^2-x^2 - roota^2-x^2/x^2

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287.

find the ninth term of progression 1/4 , -1/2 , 1 ,-2 _ _ _ _ _ _ _ _ |

Answer» 64
288.

Question paper send krdo koii

Answer» Bhai yha kaise karte hai nahi pta?
289.

BEST OF LUCK FOR YOUR EXAM. ALLL OF YOU????

Answer» Kaisa gya exam<br>Thnks sona.
290.

Which term of GP 2,1,1/2,1/4........ is 1/1024

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291.

Cos(x+y)=cosxcosy-sinxsiny show sin2x cos2x

Answer» Cos(x+x) = cosxcosx-sinxsinxCos2x = cos^2 x - sin^2 x = 2cos^2 x - 1 =1 - 2sin^2 xWe know that sin(x+y) = sinxcosy+cosxsiny => sin(x+x) = sinxcosx+cosxsinx => sin2x = 2sinxcosx
292.

Use delta method to find the derivative of cos (3x+5)

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293.

Find Derivatives of Y=tanx

Answer» dx/dt Y = dx/dt tanx Sec^2x
294.

2+3 sin x + 4 cos x

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295.

Find the equation of set of points

Answer» Infinite set
296.

If the words are written as in a dictionary what will be the 26th word

Answer» Which word
297.

How to calculate (B-C)\'

Answer» First we calculate B-C and then subtract from universal set (U) the answer is come
298.

Find the principal and general solutions of the tanx=root3

Answer» tan 60 °=√3<br>X=60°
299.

Find the equation of the circle with center (0,2) and radius (2)

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300.

Cot square theta upon( 1 - cosec theta ) square equal to 1 + sin theta upon 1- sin theta

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