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etanxsinxsecxdx=

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a
etanx.cosx+C
b
etanx.sinx+C
c
−etanx.cosx+C
d
etanx.secx+C

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detailed solution

Correct option is C

∫etansin⁡xdx−∫etan⁡xsec⁡xdx  (by parts) =−cos⁡xetan⁡x+∫cos⁡xetan⁡x⋅sec2⁡xdx−∫etan⁡xsec⁡xdx=−cos⁡x⋅etan⁡x+C


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