Question

Please help
Verify:
Sec^2x(1-cos^2x)=tan^2x

Answer 1

sec^2x (1-cos^2x) = tan^2x

sec^2x = 1/cos^2x
1-cos^2x = sin^2x

Therefore:
1/cos^2x (sin^2x) = sin^2x/cos^2x = tan^2x

Answer 2

Thanks alot.