TRIGONOMETRY - PART - 25 - TRIGONOMETRICAL RATIOS - 100 PROBLEMS

ICSE MATHS CLASS 9 – PAGE -294

EXERCISE – 22(B) – PROBLEM – 16

If 3 cos A = 4 sin A, find the value of:

(i) cos A (ii) 3 – cot ^2 A + cosec ^2 A.