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Trigonometric Identities - Math is Fun The Trigonometric Identities are equations that are true for Right Angled Triangles (If it isn't a Right Angled Triangle use the Triangle Identities page) Each side of a right triangle has a name: Adjacent is always next to the angle And Opposite is opposite the angle
Trigonometric Identities - All Trigonometry Identities With . . . Trigonometric identities include reciprocal, Pythagorean, complementary and supplementary, double angle, half-angle, triple angle, sum and difference, sum and product, sine rule, cosine rule, and a lot more Learn all trig identities with proofs
Trigonometry identities - Math Open Reference Trigonometry (trig) identities All these trig identities can be derived from first principles But there are a lot of them and some are hard to remember Print this page as a handy quick reference guide Recall that these identities work both ways