NCERT Solution X

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8. 4, ix, x. ppt

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Introduction to trigonometry: 

Introduction to trigonometry CHAPTER – 8 EXERCISE – 8.4

QUESTION 5:- 1 (ix) (cosec A – sin A) (sec A – cos A) = —-------------------- tan A + cot A: 

QUESTION 5:- 1 (ix) (cosec A – sin A) (sec A – cos A) = —-------------------- tan A + cot A

(1 + tan2 A ) = 1 – tan A 2 = tan2 A(1 + cot2 A ) 1 – cot A: 

(1 + tan2 A ) = 1 – tan A 2 = tan2 A (1 + cot2 A ) 1 – cot A

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