Tuesday 14 January 2020
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
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