3COSA-4COS3A=0 .... plz send the full solution according to class 10..
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this question is incomplete something is missing in it
samyakjain336p8x3z5:
why do you think the question is incomplete
because it is incomplete
the full questions is if sinB =1/2 ,show that 3cosB-4cos^3B =0
you are asking r.d. questions
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