Introduction to trogonometry

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chapter 8 Excercise 8. 1

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Introduction to Trigonometry: 

Introduction to Trigonometry Chapter 8 Exercise 8.1

QUESTION 6 :-If angle A and angle B are acute angles such that cos A = cos B, then show that angle A = angle B.: 

QUESTION 6 :- If angle A and angle B are acute angles such that cos A = cos B, then show that angle A = angle B.

QUESTION 7:-If cot θ =7/8, evaluate : (i) (1+sinθ)(1-sinθ) , (ii) cot2θ (1+COSθ)(1-COSθ): 

QUESTION 7:- If cot θ =7/8, evaluate : (i) (1+sinθ)(1-sinθ) , (ii) cot2θ (1+COSθ)(1-COSθ)

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