Definition Of Arccosine

Arccosine is the inverse function of cosine. It is also written as arccos or cos^-1.
If y = cos x, then x = arccos y.

Examples of Arccosine

 or 
This means that the angle 30⁰ has cosine equal to .

Video Examples: Arccos Tnverse Trig Function

Solved Example Clockple on Approximate

Ques: 

Choices:

A. 0.3
B. 0.2 
C. 0.5 
D. 0.6
Correct Answer: D

Solution:

Step 1: Recall that cos(arccos x) = x, for - 1 ≤ x ≤ 1.
 

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