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*CAH: Cosine = adjacent over hypotenuse
*CAH: Cosine = adjacent over hypotenuse
*TOA: Tangent = opposite over adjacent
*TOA: Tangent = opposite over adjacent
==Formulas==
Complementary formulas:
:<math>\sin(90^\circ-\alpha) \, = \, \cos\alpha</math>
:<math>\cos(90^\circ-\alpha) \, = \, \sin\alpha</math>
Pythagorean trigonometric identity:
:<math>\sin^2\alpha + \cos^2\alpha \, = 1</math>
==External links==
==External links==