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प्रश्न
Evaluate : `intsin(x-a)/sin(x+a)dx`
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उत्तर
`intsin(x-a)/sin(x+a)dx`
Let `, (x + a) = t `
`intsin(t-2a)/sint dt=int(sintcos2a-costsin2a)/sint dt=int(cos2a-cot t sin2a)dt`
`therefore intsin(t-2a)/sint dt =(cos2a)t-(sin2a)log|sint|+C`
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