SOLUTION: Could someone help me with this problem please: Use trigonometric identities to find the exact value of sin(5π/8). Thank you in advanced :).

Algebra ->  Trigonometry-basics -> SOLUTION: Could someone help me with this problem please: Use trigonometric identities to find the exact value of sin(5π/8). Thank you in advanced :).      Log On


   

Question 970446: Could someone help me with this problem please:
Use trigonometric identities to find the exact value of sin(5π/8).
Thank you in advanced :).
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Look on Wikipedia.
Half angle formula
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= sin(225/2) degrees