Evaluate 7 cot2 0 – 7 cosec2 O a) -1. b) -7. c) 1 d) none of these​

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Evaluate 7 cot2 0 – 7 cosec2 O a) -1. b) -7. c) 1 d) none of these​

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Lydia 2 days 2021-10-12T09:35:59+00:00 1 Answer 0 views 0

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    2021-10-12T09:37:06+00:00

    5cot230o+7cosec245o=5⋅(3)2+7(2)2   [∵cot30o=3,cosec45o=2]

    =5⋅3+7⋅2

    =15+14

    =29.

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