# Is it possible to solve this integrate by integrate substitution method?

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#int tanx/secx#

Not this away: #int [(senx)/(cosx)]# #cosx/1#

#int senx#

-cos x + c

Not this away:

-cos x + c

Here is one way. (I think it is harder than what you did.)

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Here is another substitution that will work.

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