SOLUTION: Using a the half angle identity, find the exact value of sin22.5 degrees

Algebra ->  Trigonometry-basics -> SOLUTION: Using a the half angle identity, find the exact value of sin22.5 degrees       Log On


   

Question 867840: Using a the half angle identity, find the exact value of sin22.5 degrees
Found 2 solutions by lwsshak3, Alan3354:
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
Using a the half angle identity, find the exact value of sin22.5 degrees
Identity: sin%28x%2F2%29=sqrt%28%281-cos%28x%29%29%2F2%29

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Look up the half-angle formula and find out.
Wikipedia covers it very well.
You got a broken finger?