SOLUTION: verify sin36 + sin54= sqrt(2) cos 9

SOLUTION: verify sin36 + sin54= sqrt(2) cos 9

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Question 1004105: verify sin36 + sin54= sqrt(2) cos 9
Answer by ikleyn(52835) (Show Source): You can put this solution on YOUR website!
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Apply the addition formula for sine (see the lesson Addition and subtraction of trigonometric functions in this site)

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