Verifying Identities

The document contains 12 trigonometric identities to verify. The identities involve trigonometric functions like sine, cosine, tangent, cotangent, secant, and cosecant. They include standard identities like (1 - cos^2(y))(1 + cot^2(y)) = 1 as well as less common identities like tan(β) + cot(β) = sec(β)csc(β). The goal is to practice verifying various trigonometric identities.