Question
Solution
sec ÆŸ - tan ÆŸ = x/y ------ (i) sec ÆŸ + tan ÆŸ = y/x ------ (ii) solving (i) and (ii), we get => 2 sec ÆŸ = (x2 + y2)/xy => sec ÆŸ = (x 2 + y 2)/2xy
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