SOLUTION: I need help finding the exact values Use a double-angle identity to find the exact value of sin(8π/3)

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Question 1194999: I need help finding the exact values Use a double-angle identity to find the exact value of sin(8π/3)
Answer by ikleyn(52835) About Me  (Show Source):
You can put this solution on YOUR website!
.

The angle  %288%2Api%29%2F3%29 = 2%2Api + %282%2F3%29%2Api is equivalent to %282%2Api%29%2F3 = 120 degrees.


THEREFORE,  sin%288pi%2F3%29 = sin(120°) = sqrt%283%29%2F2.    ANSWER


The value  sin(120°)  is the table value, and every student studying Trigonometry must know the value.

Solved.