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If int e^(alpha x) ( ( 1- beta sin x )/(...

If` int e^(alpha x) ( ( 1- beta sin x )/(1 - cos x ) ) dx = -e^x cot x/2+c, ` then
` (alpha^2 + beta^2)/(2 alpha beta)` =

A

A. `-1`

B

B. `1`

C

C. `2`

D

D. `-2`

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The correct Answer is:
B
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