1.

फलनों का x के सापेक्ष समाकलन कीजिए - `(1)/(sinx+cosx)`

Answer» Correct Answer - `(1)/(sqrt2)log tan((x)/(2)+(pi)/(8))`
`int(1)/(sinx+cosx)dx=int(1)/((2sin.(x)/(2)cos.(x)/(2))+(cos^(2).(x)/(2)-sin^(2).(x)/(2)))dx`
अब माना `tan.(x)/(2)= t rArr sec^(2).(x)/(2)dx=2dt`


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