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Business, 04.03.2021 08:40 putaprincess16

Prove the equation
sin 3a + sin 7a+sin 10a = 4 sin 5a cos (7a/2) cos (3a/2)​

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Prove the equation
sin 3a + sin 7a+sin 10a = 4 sin 5a cos (7a/2) cos (3a/2)​...
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