If angle A and angle B are acute angles such that cos A = cos B, then show that angle A = angle B.
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cos A = cos B
take inverse
arc cos (cosA) = arc cos (cos B)
so. A= B.
take inverse
arc cos (cosA) = arc cos (cos B)
so. A= B.
tejesh59:
ye kaisa trick hai galat hai answer nahi trick
this is inverse of cos function this is not a trick it is math.
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your answer is in the above attachment
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