(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Simplify the expression:

cos(2sin^-1 (5x))

2. Relevant equations

Fundamental identities: 1 = sin^2 ϑ + cos^2 ϑ : I think you use this one?

3. The attempt at a solution

Let y=2sin^-1(5x)

sin y = 10x

so, you plug in?

1 = 10x^2 + cos^2 y

not really sure if im on the right path or what to do next

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# Simply Trig Expression

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