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Integrate the following int(sectheta tan...

Integrate the following `int(sectheta tantheta)/(sec^2theta+4) d theta`

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`int(sectheta tantheta)/(sec^2theta+4) d theta`
[put `sectheta=t` then `sectheta cdot tantheta d theta =dt`
`int(dt)/(4+t^2)`=`int(dt)/(2^2+t^2)=(1/2)tan^(-1)(t/2)+C`
`(1/2)tan^(-1)(sectheta/2)+C`
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