Book: RS Aggarwal - Mathematics
Chapter: 4. Inverse Trigonometric Functions
Subject: Maths - Class 12th
Q. No. 8 D of Exercise 4C
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8 D
Solve for x:
To find: value of x
Formula Used: 
Given: 
LHS = cos(2sin-1 x)
Let θ = sin-1 x
So, x = sin θ … (1)
LHS = cos(2θ)
= 1 – 2sin2 θ
Substituting in the given equation,
Substituting in (1),
Therefore, 
are the required values of x.
Chapter Exercises
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