SOLUTION: Sin 20pi/9 * Cos 17pi/36 - Cos 20pi/9 * Sin 17pi/36 I tried the full equation Sin(A+B)and Sin(A-B) also for Cos but it won't work out. I think am doing something wrong with plug

Question 1005145: Sin 20pi/9 * Cos 17pi/36 - Cos 20pi/9 * Sin 17pi/36
I tried the full equation Sin(A+B)and Sin(A-B) also for Cos but it won't work out. I think am doing something wrong with plugging it into the formula but it would never give me a degree on the unit circle.
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

John

My calculator said it, I believe it, that settles it

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