Home
Class 12
MATHS
If cos A = 3/4 then sin ""(A) /(2 )...

If ` cos A = 3/4 ` then ` sin ""(A) /(2 ) . Sin 5 (A)/(2) ` is

A

`1/(32)`

B

`(11)/(8)`

C

`(11)/(32)`

D

`(11)/(16)`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRIC FUNCTIONS

    NEW JOYTHI PUBLICATION|Exercise QUESTIONS FROM COMPETITIVE EXAMS|134 Videos

  • TRIGONOMETRIC FUNCTIONS

    NEW JOYTHI PUBLICATION|Exercise QUESTIONS FROM COMPETITIVE EXAMS|134 Videos

  • THREE DIMENSIONAL GEOMETRY

    NEW JOYTHI PUBLICATION|Exercise Objective|36 Videos

  • VECTOR ALGEBRA

    NEW JOYTHI PUBLICATION|Exercise CONTINUOUS EVALUATION|2 Videos

Similar Questions

Explore conceptually related problems

Match list - I with list II ListI " " List II sin 2A " "cos^(2)A - sin^(2)A cos 2A " "2 sin A cos A sin 3A " "2 sin (A)/(2) cos (A)/(2) sin A " "3 sin A - 4 sin^(3) A

The maximum value of 4 sin^(2) x + 3 cos^(2) x + sin ""(x)/(2) + cos"" (x)/(2) is

Prove that cos 2 x cos ""x/2 - cos 3x cos ""(9x)/(2) = sin 5x sin ""(5x)/(2)

Prove that sin 3x + sin 2x - sin x = 4 sin x cos ""(x)/(2) cos "" ( 3x )/(2)

(cos x- cos y) ^(2) + (sin x - sin y) ^(2) =4 sin ^(2) "" ( x-y)/(2)

Prove that (cos x- cos y ) ^2 + ( sin x - sin y ) ^2 = 4 sin ^2"" ((x-y))/(2)

If A + B + C = 180^(@) , prove that sin A + sin B + sin C = 4 cos (A)/(2) cos"" (B)/(2) cos"" (C )/(2)

Prove that cos 2x cos "" x/2 -cos 3x cos " (9x)/(2) = sin 5x sin ""(5x)/(2).