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OpenStudy (anonymous):
Find the exact value of the expression, if possible. Do not use a calculator. cos (cos^-1 0.2) A. 0.2 B. 3.3 D. 1
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OpenStudy (anonymous):
@johnweldon1993 @AnswerMyQuestions
OpenStudy (johnweldon1993):
Hint: \[\large cos(cos^{-1} (x)) = x\]
OpenStudy (johnweldon1993):
So cos, and arccos cancel each other out :)
OpenStudy (anonymous):
Thank you
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