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Pls help me to solve this question......................................???!!???!?????

Pls help me to solve this question......................................???!!???!????? 

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1 Answers

Aditya Gupta
2080 Points
2 years ago
put theta = x
note that cosx+sinx/cosx-sinx= tan(x+pi/4)
now, put x+pi/4=y
so integral becomes sin2ylntanydy
now integrate by parts taking first function u as lntany and second function v as sn2y

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