Arccosine : arccos. The arccos function allows the calculation of the arc cosine of a number.
The arccos function is the inverse functions of the cosine function.
Arcsine : arcsin. The arcsin function allows the calculation of the arc sine of a number.
The arcsin function is the inverse function of the sine function.
Arctangent : arctan. The arctan function allows the calculation of the arctan of a number.
The arctan function is the inverse functions of the tangent function.