SOLUTION: how can i solve without a calculator the exact value of tan (23pie/4) ??

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Question 522970: how can i solve without a calculator the exact value of tan (23pie/4) ??
Answer by lwsshak3(11628) About Me  (Show Source):
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how can i solve without a calculator the exact value of tan (23pie/4) ??
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(23pie/4)=(20π/4+3π/4)=(5π+3π/4)
This means rotating counter-clockwise 5π plus an additional 3π/4 which places a reference
angle of π/4 in quadrant IV where tan<0.
So, tan (23pie/4)=tan(π/4)=-1