Manuals/calci/ACOS

ACOS(x)

• Where x is the number and it is varying from -1 to 1.
• The value of ACOS(x) in radians in the range 0 to pi().
• Calci returns the value of arccosine (inverse cosine) in Radians.
• The number can be a single value or any number of values.

For example, ACOS(0.5,(-0.2),1) gives the arcCOS or inverseCOS values for each element.

Description

Consider     x = 0.8    then     =ACOS(0.8)    gives    0.64350110879

• This function is the inverse function of COS in trigonometry.
• Also it is called as Cyclometric function.
• ACOS is described as arcCOS of a given number and denoted by $cos^{-1}(x)$.
• In ACOS(x), x value should be between -1 & 1.
• To find the angle in degrees, multiply the result angle with 180/PI(), or use DEGREES function.
  

For example ACOS(0.5)*180/PI() or DEGREES(ACOS(0.5)) gives 60

Examples

ACOS(x)

• x   is the number

ACOS(number)	Angle(radians)
ACOS(0)	1.57079632
ACOS(1)	0

Related Videos

Inverse Cosine

See Also

• COS

• DCOS

• COSH

References

• List of Trigonometric Functions

• List of Main Z Functions

• Z3 home