Returns a number specifying the tangent of an angle given in radians. It takes a right-angle triangle, and returns the length of the side opposite the specified angle divided by the length of the side adjacent to the angle.
Parameter
number - An angle in the form of number of radians.
Return value
Number value.
Examples
tan(1) - Returns 1.5574 (rounded to 4 decimals). This is the tangent of 1 radian.tan(45 * pi / 180) - Returns 1.0. This is the tangent of 45 degrees. Before taking the tangent, the angle is first converted to radians by multiplying it with pi/180.