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Cot'4A-1=COSEC'4A-2cosec2A

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Cot'4A-1=COSEC'4A-2cosec2A

Posted by Charles Vallathukaran 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Nikhil Thomas 6 years, 4 months ago

cosec^4A - 2cosec^2A =cosec^2A( cosec^2A - 2 ) =cosec^2A( cosec^2A - 1 - 1 ). =cosec^2A( cot^2A - 1 ) =( cot^2A + 1 )( cot^2A - 1) =cot^4A - 1

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