Recent questions and answers in Class XI Maths

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Find all numbers that verify the system:

asked Nov 18 in Class XI Maths by Erza (15 points)

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asin2x +bcos2x=c prove that cot2x=c-a/b-c

asked Oct 26 in Class XI Maths by mkmalla (15 points)

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find the value of tan 2a

asked Sep 19 in Class XI Maths by Ashley (15 points)

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B={x/x^2=x,xbelongs to R

asked Jul 13 in Class XI Maths by Rohan Jain (15 points)

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Solve the inequality

asked Jul 6 in Class XI Maths by Aman rr (15 points)

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Find the term independent of x in (2x^1/2-3÷x^1/3)^20

asked Jun 16 in Class XI Maths by Sheikh rashid (15 points)

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asked Jun 15 in Class XI Maths by Nilesh (15 points)

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2 answers

If x = sec ϕ - tanϕ and y = cosec ϕ + cot ϕ then show that xy + x -y +1=0.

answered Jun 5 in Class XI Maths by lab Basic (36 points)

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2 answers

The value of cos 12° + cos 84° + cos 156° + cos 132° is

answered Jun 3 in Class XI Maths by lab Basic (36 points)

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If sin(θ + α) = a and sin(θ + β) = b , then prove that cos2(α – β) – 4abcos(α – β) = 1-2a2 -2b2.

answered May 31 in Class XI Maths by lab Basic (36 points)

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If (2 sin α)/(1 + cos α + sin α) = y, then prove that (1 - cos α + sin α)/(1 + sin α) is also equal to y.

answered May 31 in Class XI Maths by lab Basic (36 points)

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If Sin A=1/√10 and Sin B=1/√5,where A and B are positive acute angles, then A+B=?

asked May 24 in Class XI Maths by Riya1023 Basic (31 points)

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convert the given frequency distribution into a continuous grouped frequency distribution in which intervals would 153.5 and 157.5 be included.

asked Apr 28 in Class XI Maths by sekgobela walter (10 points)

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Prove that √1-cosx/1+cos2x

asked Apr 24 in Class XI Maths by Gaius Iliya (10 points)

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If the order of matrix A is 4*3 order of matrix B is 4*5 and order of matrix C is 7*3 then order of matrix (A’*B’)*C’ is

asked Apr 14 in Class XI Maths by Kira (15 points)

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Find the coefficient of x⁴ in the expansion of (1+x-2x²)^7

asked Mar 23 in Class XI Maths by 20Aryan02 (15 points)

+2 votes

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If (a+b)=m,a2+b2=n,a3+b3=p3 how can i prove: m3+2p3=3mn

asked Feb 24 in Class XI Maths by S (17 points)

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Sin(cos^3/5+sin^5/13)=63/65

asked Feb 8 in Class XI Maths by विजय (15 points)

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7power2n+2the whole power 3n-3×3the whole power n-1 is divisible by 25

asked Dec 15, 2018 in Class XI Maths by Yagngna (16 points)

+1 vote

1 answer

Prove that: log 2 + 2 log 5 - log 3 - 2 log 7 = log 50/147.

answered Dec 8, 2018 in Class XI Maths by Amresh Pro (116 points)

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