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int cos 2 theta.ln((costheta+sintheta)/(...

`int cos 2 theta.ln((costheta+sintheta)/(costheta-sintheta)) d theta`

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The correct Answer is:
`|cos 2 theta|+c`
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MODERN PUBLICATION-INTEGRALS-EXERCISE 7( e) LONG ANSWER TYPE QUESTION (II)
  1. int cos 2 theta.ln((costheta+sintheta)/(costheta-sintheta)) d theta

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