Prove that √2 cosa - 2SinA = √2 sinA
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Just check ... maybe there are other methods too...
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kusum2003kin:
or you can just put the value of cosa from cos2a+sin2a=1 and put into cosa-sina=root2sina
but i really think the ques is wrong...
what is the source of this ques?
what is the source of this ques?
sample paper
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