Definition of trigonometric function in English:
A function of an angle, or of an abstract quantity, used in trigonometry, including the sine, cosine, tangent, cotangent, secant, and cosecant, and their hyperbolic counterparts. Also called circular function.
- It was also in Berlin that he discovered the famous Euler's Identity giving the value of the exponential function in terms of the trigonometric functions sine and cosine.
- Some readers raised on an analytic treatment, with its abundance of hyperbolic trigonometric functions, natural logarithms and the like, may find the synthetic approach, using only Euclidean circles and lines, somewhat surprising.
- It handles general math functions, exponential and logarithmic functions, and trigonometric functions.
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