Question

What basic trigonometric identity would you use to verify that sinx cosx tanx=1-cos^2x

Answer 1

You could use the following identities in verifying the trigonometric expression sinx cosx tanx=1-cos^2x:

tanx = sinx/cosx
sin^2x+cos^2x = 1

When those identities are used, you could now verify the equation.

Hope that helps you.