Tuesday 14 January 2020

TRIGONOMETRY - PART - 12 - TRIGONOMETRICAL RATIOS - 100 PROBLEMS

ICSE MATHS CLASS 9
EXERCISE – 22(B) – PROBLEM - 03
In the diagram, given below, triangle ABC is right-angled at B and BD is perpendicular to AC find
(i) cos DBC  (ii) cot DBA

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