Introduction to Trigonometry : Introduction to Trigonometry CHAPTER – 8
EXERCISE – 8.1
QUESTION 8:-If 3cotA = 4, check whether (1-tan2A)/(1+tan2A)= cos2A - sin2A or not. : QUESTION 8:- If 3cotA = 4, check whether (1-tan2A)/(1+tan2A)= cos2A - sin2A or not.
QUESTION 9:- In triangle ABC, right - angled at B, if tan A = 1/√3, find the value of:(i) sin A cos C + cos A sin C (ii) cos A cos C – sin A sin C : QUESTION 9:- In triangle ABC, right - angled at B, if tan A = 1/√3, find the value of: (i) sin A cos C + cos A sin C (ii) cos A cos C – sin A sin C
QUESTION 10:-In ∆ PQR, right-angled at Q, PR + QR = 25cm and PQ = 5cm. Determine the values of sin P, cos P and tan P. : QUESTION 10:- In ∆ PQR, right-angled at Q, PR + QR = 25cm and PQ = 5cm. Determine the values of sin P, cos P and tan P.
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