Cos(x/5)sin(x/5)=1/2[sin(2x/5)] A. True B. False ...?

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asked Oct 7, 2017 167k views

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Stephan Tolksdorf · Answer 1 · 2017-10-13T11:28:20+0000

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)]

Cos(x/5)sin(x/5)=1/2[sin(2x/5)] A. True B. False ...?

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