**TAN**

*function: calculate tangent of an angle*

t#=**Tan**(angle)

t#=**Tan**(angle#)

For any angle, the tangent is the result of when its sine is divided by its cosine. The TAN function generates the tangent of a given angle. For example:

E> Degree : Print Tan(45) Radian : Print Tan(Pi#/8)

**ACOS**

*function: calculate arc cosine*

a#=**Acos**(number#)

The ACOS function takes a number between -1 and +1, and calculates the angle which would be needed to generate this value with COS. For example:

E> A#=Cos(45) Print Acos(A#)

**ASIN**

*function: calculate arc sine*

a#=**Asin**(number#)

Similarly to ACOS, the ASIN function calculates the angle needed to generate a value with SIN.

**ATAN**

*function: calculate arc tangent*

a#=**Atan**(number#)

ATAN returns the arctan of a given number, like this:

E> Degree : Print Tan(2) Degree : Print Atan(0.03492082)

A hyperbola is a conical section, formed by a plane that cuts both bases of a cone. In other words, an asymmetrical curve. Wave forms and trajectories are much more likely to follow this sort of eccentric curve, than perfect arcs of circles. The hyperbolic functions express the relationship between various distances of a point on the hyperbolic curve and the coordinate axes.

**HSIN**

*function: calculate hyperbolic sine*

h#=**Hsin**(angle)

h#=**Hsin**(angle#)