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This is a simple algorithm for deciding trigonometric identities that can be brought into the form polynomial(sin x, cos x) = 0 :. ... <看更多>

Why can't I manipulate the entire equation? You can. The analytical method for proving an identity consists of starting with the identity you want to prove, ... ... <看更多>

Trigonometric Pythagorean Identities. Last year in Precalculus, I had students start with: $latex \sin^2(\theta)+\cos^2(\theta)= ... ... <看更多>