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Sec 4a=cosec (a-20)

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Sec 4a=cosec (a-20)

Posted by Sahil Das 7 years, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Aditya Singh 7 years, 6 months ago

Sec4a = cosec (a-20) -----1 Sec4a = cosec (90-4a) ———2 (from 1 and 2) Cosec (a-20) = cosec (90-4a) a-20 = 90-4a 5a = 110 a = 22

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