Q.2435 : यदि sec²: A = 3 हो तो tan²: A - cosec²: A/ tan²: A + cosec²: A = ?

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Q.2435 : यदि sec²: A = 3 हो तो tan²: A - cosec²: A/ tan²: A + cosec²: A = ?
(a) 1/7
(b) 2/7
(c) 3/7
(d) 4/7

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Answer :1/7