class 10th exercise 8.1 question 6 mathematics trigonometry

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class 10th exercise 8.1 question 6 mathematics trigonometry.

if angle A and Angle B are acute angles such that Cos A equal to cos B then show that angle A equal to Angle B
class 10th mathematics exercise 8.1 question 6
question 6 exercise 8.1 class 10th NCERT solution
exercise 8.1 question 6 class 10th NCERT solution
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