2 Answered Questions for the topic double angle formulas
Double Angle Formulas Precalculus
(cos^2(2x))(sin^2(2x))Write the expression in terms of first powers of cosine. Simplify as much as possible.
Given Cos (2x)= -24/25, 2nd Quadrant (pi/2 <x< pi); What is Sin(x) ?
Am I missing something big here? I've gotten around to making sin(2x)=7/25 but I don't understand how to go from double angle to single angle using identities.