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Prove that: (sin x + sin 3x)/(cos x + cos 3x) = tan 2x
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Apr 7, 2019
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Class 11
by
kratos
Prove that:
(sin x + sin 3x)/(cos x + cos 3x) = tan 2x
class-11
trigonometric functions
cbse
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answered
Apr 29, 2020
by
kratos
Best answer
It is known that
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