SOLUTION: find the exact value of tan315 using a sum or difference identity.

SOLUTION: find the exact value of tan315 using a sum or difference identity.

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Question 548441: find the exact value of tan315 using a sum or difference identity.
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
find the exact value of tan315 using a sum or difference identity.
**
tan(315)=tan(360-45)=(tan 360-tan 45)/(1+tan 360*tan 45)
tan 360�=0
tan 45�=1
(tan 360-tan 45)/(1+tan 360*tan 45)
(0-1)/(1+0*1)=-1/1=-1
ans:
tan 315�=-1
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