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Differentiate the following function ...

Differentiate the following function `sin^2(2x+1)`

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`sin^2(2x+1)`
`d/{dx}sin^2(2x+1)`
`=2sin(2x+1)d/{dx}sin(2x+1)`
`=2sin(2x+1)cos(2x+1)d/{dx}(2x+1)`
`=sin2(2x+1)\times 2`
`=2sin(4x+2)`
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