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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.
We need to use the inverse function for tan, tan-1, to find the angle. This function is on the same key on the calculator as the tan function (shift tan). We use the following sequence of commands: shift - tan-1 0.75 = 37. Try the following on your calculator to see the difference between tan and tan-1: angle â ratio ratio â angle.