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# OU U If tan? 0 = 2 tan? 0 + 1, then the value of cos 20 + sina o is (A) 1 (B) 2 (C) - 1 (D) Independent of

JEE/Engineering Exams
Maths
Solution
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Gluen ( tan ^{2} theta=2 tan ^{2} phi+1 ) And we Know that