Manuals/calci/ACOS

ACOS(n)

• Where n is the COS of the angle and is from -1 to 1.
• by default the result obtained will be in radians

• Calci returns the arcCOS (inverse Cos) of a number. Output is the angle in radians.
• To convert arcCOS to the degrees, multiply it by 180/PI.
• The number can be a single value or any number of values.

For example, ASIN(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 trignometry.
• Also it is called as Cyclometric function.
• ACOS is described as arcCOS and denoted by $cos^{-}1(n)$.
• In ACOS(x),x value should be with in -1 & 1.
• Here x is in radians. To convert a degree value to radian, multiply 'x' with PI()/180 or use the radians function RADIANS(x)

Number	ACOS
0.8	0.64350110879
-0.22	1.792610797291
0.2	1.567305661202

Examples

ACOS(x)

• x   is the angle in radians.

TAN(Radian)	Value
ACOS(0)	1.5707963267948966
ACOS(1)	0

See Also

• COS

• DCOS

• COSH

References

• List of Trigonometric Functions
• ACOS