1.

Evaluate: `int((3sinx-2)cosx)/(5-cos^2x-4sinx) dx`A. `cosx+(1)/(2)cos2x-(1)/(3)cos3x+C`B. `cosx-(1)/(2)cos2x-(1)/(3)cos3x+C`C. `cosx+(1)/(2)cos2x+(1)/(3)cos3x+C`D. `cosx-(1)/(2)cos2x+(1)/(3)cos3x+C`

Answer» Correct Answer - B
`I=int 4sinx "cos"(x)/(2)"cos"(3x)/(2)dx `
`=int 2sinx(cos2x+cosx)dx`
`=int(sin 3x-sinx+sin2x)dx`
`=cosx-(1)/(3)cos 3x-(1)/(2)cos2x+C`


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