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Tanh is the hyperbolic tangent function, which is the hyperbolic analogue of the Tan circular function used throughout trigonometry. Tanh [Î±] is defined as the ratio of the corresponding hyperbolic sine and hyperbolic cosine functions via . Tanh may also be defined as , where is the base of the natural logarithm Log. Tanh automatically evaluates to exact values when its argument is the (natural) logarithm of a rational number.
3. tan-ratio of the opposite to the adjacent side of a right-angled triangle. tangent. circular function, trigonometric function-function of an angle expressed as a ratio of the length of the sides of right-angled triangle containing the angle.