SOLUTION: Find the exact value of y=arccos(tan7pi/4)?

Question 436367: Find the exact value of y=arccos(tan7pi/4)?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Find the exact value of y=arccos(tan7pi/4)?
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1st: tan(7pi/4) = -1
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2nd: arccos(-1) = 3.1416..
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Cheers,
Stan H.
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