TRIGONOMETRY - PART - 44 - TRIGONOMETRICAL RATIOS - 100 PROBLEMS.

ICSE MATHS CLASS 9 – PAGE -294

EXERCISE – 22(B) – PROBLEM – 35

In triangle ABC, angle B = 90 degrees, AB = 40, AC + BC = 80. Find (i) sin A (ii) cos A (iii) tan C.