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22 November, 12:36

cos (x/5) sin (x/5) = 1/2[sin (2x/5) ]

A. True B. False ... ?

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  1. 22 November, 15:46
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    As I see this equation cos (x/5) sin (x/5) = 1/2[sin (2x/5) ] is correct. So it's true. Usr this trick to simplify the equation and check it. cos (u) sin (v) = 1/2[sin (u+v) + sin (u-v) ]
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