Returns the tangent of an angle specified in radians.
float tan(float number)
number is the angle, in radians, whose tangent you want.
For any right triangle, the tangent of an acute angle is the following ratio:
The ratio depends only on the size of the angle and not on the size of the triangle. This constant ratio is called the tangent of the measure of the angle.
Example
tan(1)
Returns 1.557.