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Hey guys, I need to find sin(3 /8)

Quote: Originally Posted by goliath Hey guys, I need to find sin(3 /8) Note that . Now apply the half angle formula for sine with . Can you take it from here?

Quote: Originally Posted by goliath Hey guys, I need to find sin(3 /8) Alternatively, remember that . Can you see that ? So that would mean . And you've been told what that is...