1.

\[\int{\frac{dx}{\sin (x-a)\sin (x-b)}}\] is                [Kerala (Engg.) 2005]

A.                 \[\frac{1}{\sin (a-b)}\log \left| \frac{\sin (x-a)}{\sin (x-b)} \right|+c\]    
B.                 \[\frac{-1}{\sin (a-b)}\log \left| \frac{\sin (x-a)}{\sin (x-b)} \right|+c\]
C.                 \[\log \sin (x-a)\sin (x-b)+c\]
D.                 \[\log \left| \frac{\sin (x-a)}{\sin (x-b)} \right|\]
E.                 \[\frac{1}{\sin (x-a)}\log \sin (x-a)\sin (x-b)+c\]
Answer» B.                 \[\frac{-1}{\sin (a-b)}\log \left| \frac{\sin (x-a)}{\sin (x-b)} \right|+c\]


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