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Show that : sin 30^(@)=sqrt((1-cos60^(@...

Show that : sin `30^(@)=sqrt((1-cos60^(@))/(2))`

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`sin x=1`
`rArrsin x=sin 90^(@) " " rArr " " x=90^(@)`
`rArr(x)/(3)=(90^(@))/(3)=30^(@) " " :." " tan""(x)/(3)=tan30^(@)=(1)/(sqrt(3))`
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