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10 March, 13:38

Cos (x/5) sin (x/5) = 1/2[sin (2x/5) true or false

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  1. 10 March, 16:02
    0
    Sin2x=2sinxcosx

    sin2x/5=2sinx/5cosx/5

    hence the nuber 2 multiply by cosx/5sinx/5 can be divided on the other side

    hence its true
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