Question

Please help me prove sec^2xsin^2x=sec^2x-1

Answer 1

is it squared or just 2x?

Answer 2

well use the trig identity

\[\sin^2(x) + \cos^2(x) = 1\]

make the subject

\[\sin^2(x)\]

and then substitute into the left hand side of the equation.

You also need to know

\[\sec^2(x) = \frac{1}{\cos^2(x)}\]

and that also may help