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Cot=7/8,evaluate:. (1+sin)(1-sin)/(1+cos)(1-cos)

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Cot=7/8,evaluate:. (1+sin)(1-sin)/(1+cos)(1-cos)

Posted by Kunal Lambha 5 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Madhup Chandrashekhar 5 years, 11 months ago

cot=7/8 (1+sin)(1-sin)/(1+cos)(1-cos) =1^2-sin^2/1^2-cos^2 =cos^2/sin^2 [sin^2+cos^2=1] =cot^2 =(7/8)^2 49/64

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