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Please solve RD Sharma class 12 chapter Indefinite Integrals exercise 18.8 question 29 maths textbook solution

Answers (1)

Answer:

        log\left | 2sin\, x+cos\, x \right |+C

Hint:

        \int \! \frac{dt}{t}=log\left | t \right |+C

Given:

        \int \! \frac{-sin\, x+2cos\, x}{2sin\, x+cos\, x}dx                    ....(1)

Explanation:

Let

        2sin\, x+cos\, x=t

        (2cos\, x-sin\, x)dx=dt

From (1)

        \int \! \frac{dt}{t}=log\left | t \right |+C

                    =log\left | 2sin\, x+cos\, x \right |+C

Posted by

Gurleen Kaur

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