hello everyone....plzz solve this attachment ✌️✌️☺️✍️✍️
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eix=cosx+isinx⇒e3ix=(cosx+isinx)3⇒cos3x+isin3x=(cosx+isinx)3
Now expand the cube and equate the real and imaginary parts of both sides to get the answer.
Now expand the cube and equate the real and imaginary parts of both sides to get the answer.
pooja568:
srry but its integration
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