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(tanA + cotA)2 - (tanA - …

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(tanA + cotA)2 - (tanA - cotA)2 = 4

Posted by Ragi Cherry 7 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Kunal J 7 years, 1 month ago

(tanA + cotA)^2 - (tanA - cotA)^2 tan^2 + cotA^2 + 2tanAcotA - (tanA^2 +cotA^2 - 2tanAcotA) tan^2 + cotA^2 + 2 - tanA^2 - cotA^2 +2 = 2+2 = 4 Note tanA × cotA =1 Since tanA = 1/cotA or vice versa

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CBSE > Class 10 > Mathematics