Question

Evaluate 5 cot2 30 + 7 cosec2 45.
PLEASE EXPLAIN : step by step

Answer 1

5cot2 30°+7cosec2 45°

=5(√3)2+7(√2)2. [Because cot 30°=√3

and cosec 45°=√2]

=5×3+7×2

=15+14

=29

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