Tuesday 14 January 2020

TRIGONOMETRY - PART - 28 - TRIGONOMETRICAL RATIOS - 100 PROBLEMS

ICSE MATHS CLASS 9 – PAGE -294
EXERCISE – 22(B) – PROBLEM – 19
In triangle ABC, AB = AC = 15 cm and BC = 18 cm.
Find: (i) cos B (ii) sin C (iii) tan^2 B – sec^2 B + 2



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