हिंदी

∫ Cos X 1 + Cos X D X

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प्रश्न

\[\int\frac{\cos x}{1 + \cos x} dx\]
योग
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उत्तर

\[\int\frac{\cos x}{1 + \cos x}dx\]
\[ = \int\frac{\cos x\left( 1 - \cos x \right)}{\left( 1 + \cos x \right)\left( 1 - \cos x \right)}dx\]
\[ = \int\frac{\cos x - \cos^2 x}{1 - \cos^2 x}dx\]
\[ = \int\frac{\cos x - \cos^2 x}{\sin^2 x}dx\]
\[ = \int\frac{\cos x}{\sin^2 x} - \frac{\cos^2 x}{\sin^2 x}dx\]
\[ = \int\left( \text{cot x cosec x} - \cot^2 x \right)dx\]
\[ = \int\left( \text{cot x cosec x} - cosec^2  x + 1 \right)dx\]
\[ = \int\text{cot x cosec x dx} - \  ∫ co \sec^2 x dx + \int1dx\]
\[ =\text{ - cosec x }+ \cot x + x + C\]

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  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 18: Indefinite Integrals - Exercise 19.02 [पृष्ठ १५]

APPEARS IN

आर.डी. शर्मा Mathematics Volume 1 and 2 [English] Class 12
अध्याय 18 Indefinite Integrals
Exercise 19.02 | Q 42 | पृष्ठ १५
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