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sin225^(@)=sin(180^(@)+45^(@))=-sin45^(@...

`sin225^(@)=sin(180^(@)+45^(@))=-sin45^(@)=-(1)/(sqrt(2))`
`cos246^(@)=cos(180^(@)+66^(@))=-cos66^(@)=-0.4067`
`tan211^(@)=tan(180^(@)+31^(@))=tan31^(@)=0.6009`.

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