ACOS function

ACOS returns the inverse trigonometric cosine of a number.

Syntax

ACOS (number)

This function returns the inverse trigonometric cosine of number, which is the angle (in radians) whose cosine is number. The angle returned is between 0 and PI.

Example

=ACOS(-1) returns 3.14159265358979 (PI radians).

=DEGREES(ACOS(0.5)) returns 60. The cosine of 60 degrees is 0.5.




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