Manuals/calci/ATAN

ATAN(x)

• by default the result obtained will be in radians

• Calci returns the arcTAN (inverse Tan) of a number. Output is the angle in radians.
• The number can be a single value or any number of values.

For example, ASIN(0.5,(-0.2),1) gives the arcTAN or inverseTAN values for each element.

Description

Consider     x = -0.8    then     =ATAN(0.8)    gives    0.67474094

• This function is the inverse function of TAN in trignometry
• Also it is called as Cyclometric function.
• ATAN is described as arctan and denoted by $tan^{-}1(x)$.
• In ATAN(x) ,x value appilcable for all real numbers.
• To find the angle in degrees, multiply the result angle with 180/PI.
• DEGREES function can also be used.

For example ATAN(-0.8)*180/PI() or DEGREES(ATAN(-0.8)) gives -38.659808

Examples

ATAN(x)

• x   is the angle in radians.

ATAN(x)	Value(Radian)
ATAN(0)	0
ATAN(1)	0.78539816
ATAN(90)	1.55968567

See Also

• TAN

• DTAN

• TANH

References

• List of Trigonometric Functions
• ATAN