Question

Express the following algebraic expression in terms of x.

Answer 1

\[\cos (\sin^{-1} 3x)\]

Answer 2

\[\sqrt{1-9x^2}\]

Answer 3

sin^(-1) x=cos ^(-1)root (1-x^2)
cos(cos ^(-1) root(1-9x^2))
cos and cos-1 cancels
we have
sqrt(1-9x^2)