Question

Verify the identity. cosine theta minus secant thetaequalsnegative sine theta tangent theta to verify the​ identity, start with the more complicated side and transform it to look like the other side. choose the correct transformations and transform the expression at each step.

Answer 1

I will use x for theta.

-sinx tanx = -sinx (sinx/ cosx) =
-sin²x / cosx = (cos²x - 1) / cosx = cosx - secx

and done. if there is some part you don't understand just ask!!