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trigonometric function
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Tweet n. A function of an angle expressed as the ratio of two of the sides of a right triangle that contains that angle; the sine, cosine, tangent, cotangent, secant, or cosecant. Also called circular function.  (click for a larger image) trigonometric functionIn a right triangle, the three main trigonometric functions are sine θ = opposite / hypotenuse cosine θ = adjacent / hypotenuse tangent θ = opposite / adjacent. |
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