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sin 2 theta = 2 sin theta cos theta...

`sin 2 theta = 2 sin theta cos theta`

Text Solution

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`sin(A+B)=sinAcosB+cosAsinB`
`A=theta,B=theta`
`sin(2theta)=sintheta*costheta+costheta*sintheta`
`=2sinthetacostheta`.
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