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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

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

Video Examples: Arccos Tnverse Trig Function

Solved Example Clockple on Approximate

Ques: img

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


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