Question
For what value of $x$ does $\cos x=\cos ^{-1} x ?$ Use a graphing calculator to approximate the answer.
Step 1
We are asked to find the value of $x$ for which $\cos x = \cos^{-1} x$. This means we are looking for the point where the graphs of $y = \cos x$ and $y = \cos^{-1} x$ intersect. Show more…
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