Trig Identities Unit Circle

Computer animation by Jason Schattman that shows how sine, cosine, tangent, cotangent, secant & cosecant all fit together in one beautifully unified structure on the unit circle. Along the way, you'll see animated visual "proofs" of the 3 classic Pythagorean trig identities sin^2 + cos^2 = 1 tan^2 + 1 = sec^2 cot^2 + 1 = csc^2 plus a 4th one I ...

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