JEE MATHEMATICS MCQ: INDEFINITE INTEGRATION

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Application +4 | -1

The integral of

f(x)=3^x \cos x

is given by

View answer and explanation

Correct option: C

\frac{3^x(\sin x+\cos \log 3)}{\left(1+(\log 3)^2\right)}

Option D is correct because the integral of

3^x \cos x

\frac{3^x(\log 3 \sin x+\cos x)}{\left(1+(\log 3)^2\right)}+C

after integrating by parts twice.

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