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  • Need solution for RD Sharma maths class 12 chapter Indefinite Integrals exercise 18.8 question 51

Need solution for RD Sharma maths class 12 chapter Indefinite Integrals exercise 18.8 question 51

Answers (1)

Answer:

        sec\, x+log\left | tan\frac{x}{2} \right |+C

Hint:

        sin^{2}x+cos^{2}x=1

Given:

        \int \! \frac{1}{sin\, x\, cos^{2}x}dx

Explanation:

        \int \! \frac{sin^{2}x+cos^{2}x}{sin\, x\, cos^{2}x}dx

        =\int \! \frac{sin^{2}x}{sin\, x\, cos^{2}x}dx+\int \! \frac{1}{sinx}dx

        =\int \! tan\, xsec\, xdx+\int \! cos\, e\, cxdx

        =sec\, x+log\left | tan\frac{x}{2} \right |+C

Posted by

Gurleen Kaur

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