Introduction to Trigonometry

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chapter 8 excercise 8. 3

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Introduction to trigonometry: 

Introduction to trigonometry CHAPTER – 8 EXERCISE – 8.3

QUESTION 5:-If sec 4A = cosec (A - 20o), where 4A is an acute angle, find the value of A.: 

QUESTION 5:- If sec 4A = cosec (A - 20o), where 4A is an acute angle, find the value of A.

QUESTION 6:-If A, B and C are interior angles of a triangle ABC, then show that sin (B + C) = cos A . 2 2: 

QUESTION 6:- If A, B and C are interior angles of a triangle ABC, then show that sin (B + C) = cos A . 2 2

QUESTION 7:-Express sin 67o + cos75o in terms of trigonometric ratios of angles between 0o and 45o.: 

QUESTION 7:- Express sin 67o + cos75o in terms of trigonometric ratios of angles between 0o and 45o. PLEASE VISIT AGAIN.