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`int sin 5x.cosxdx` का मान ज्ञात कीजिए ।

Answer» `intsin5x.cosxdx`
`=(1)/(2)int2sin5x.cosx dx`
`=(1)/(2)int(sin6x+sin4x)dx`
`=(1)/(2)intsin6x dx+(1)/(2)int sin 4xdx`
`=(1)/(2).(1)/(6)(-cos6x)+(1)/(2).(1)/(4)(-cos4x)+c`
`=-(1)/(12)cos6x-(1)/(8)cos4x+c`


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