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sin60^(@)=(2tan30^(@))/(1+tan^(2)30^(@))...

sin60^(@)=(2tan30^(@))/(1+tan^(2)30^(@))

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Verify that sin60^(@)=(2tan 30^(@))/(1+tan^(2)30^(@))

Prove that : sin(2 times 30^(@))=(2tan30^(@))/(1+tan^(2)30^(@))

Prove that : sin(2 times 30^(@))=(2tan30^(@))/(1+tan^(2)30^(@))

(2 tan 30^(@))/(1 + tan^(2)30^(@)) =

(2 tan 30^(@))/( 1-tan ^(2) 30^(@)) =

(2 tan 30^(@))/( 1-tan ^(2) 30^(@)) =

Verify that cos 60^(@)=(1-tan^(2)30^(@))/(1+tan^(2)30^(@))