TRIGONOMETRY - PART - 33 - TRIGONOMETRICAL RATIOS - 100 PROBLEMS

ICSE MATHS CLASS 9 – PAGE -294

EXERCISE – 22(B) – PROBLEM – 24

If 2 sin x = 1.732, evaluate

(i) sin^3 x – 3 sin x

(ii) 3 cos x – 4 cos^3 x