The six basic functions of trigonometry are the sine, cosine, tangent, cosecant, secant, and cotangent functions. Abbreviated sin, cos, tan, csc, sec, cot.
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Not specifically trigonometry, but functions in general. As a general rule, functions must be evaluated before using the results in other parts of the calcuation.
Trigonometry functions are used to work out the various properties of triangles.
The 3 most common trigonometry functions are as follows:Sine (opposite/ hypotenuse)Cosine (adjacent/hypotenuse)Tangent (opposite/adjacent)An easier way to remember these is SOH-CAH-TOA which, when pronounced out-loud, sounds kind of like "soak a toe".
In geometry, similar shapes have the same angles. This means that the values of the basic trigonometric functions of these angles are the same.
plane trigonometry spherical trigonometry