Calculus - intrigation

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writcos2x as 1-2sin^2 x

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i think it will be of no use ,i tried with cos2x as 2cox²x -1,the cosx in the dinominator is creating the problem

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seeing it carefully u ll observe the given q is same as sec²x.dx/âˆš1-tan²x.i hope this ll solve our problem

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convert cos x to secx and further to tan x....

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multiply numerator n denominator by sec x...n write denominator in terms of tan x..n take tan x=z...den do substitution..

intrigation