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TS EAMCET 2023 (Online) 12th May Morning Shift
MCQ (Single Correct Answer)
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If $n$ is a positive integer greater than 1 and $I_n=\int \frac{\sin n x}{\sin x} d x$, then $I_{n+1}-I_{n-1}=$
A
$\frac{2}{n-1} \cos (n-1) x$
B
$\frac{2}{n-1} \sin (n-1) x$
C
$\frac{2}{n} \cos n x$
D
$\frac{2}{n} \sin n x$
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