SOLUTION: Exact value of cos^-1(tan(3pie/4))

Question 521601: Exact value of cos^-1(tan(3pie/4))
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
Exact value of cos^-1(tan(3pie/4))
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tan(3pie/4)=-1 (reference angle in quadrant II where tan<0)
cos^-1(-1)=π
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