How can I prove sin2teta=2costeta×sinteta easily
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sin 2Θ= sin(Θ+Θ)
=sinΘ cosΘ+cosΘ sinΘ
=2 cosΘ sinΘ
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Sin2tta= sin(tta+ tta) =sintta.costta+ costta.sintta
=2 costta.sintta
=2 costta.sintta
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