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  Inverse function     Cosine  

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Arccosine
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.

Example of Arccosine


  • or

    This means that the Angle 30° has Cosine equal to .

Solved Example on Arccosine


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.

Related Terms for Arccosine

Additional Links for Arccosine


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