Question

Can someone please help me solve for "x".

2cos^2 x = sec^2 x / 2

Answer 1

hint:
substitute \(\sec(x) = \dfrac{1}{\cos(x)}\).

Answer 2

Is question:
A. \(2\cos^2(x)=\dfrac{\sec^2(x)}{2}\)
or
B. \(2\cos^2(x)=\sec^2(\dfrac{x}{2})\)