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cos60^(@)cos30^(@)-sin60^(@)sin30^(@)...

cos60^(@)cos30^(@)-sin60^(@)sin30^(@)

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Evaluate : cos60^(@)cos30^(@)+ sin 60^(@)sin30^(@)

Calculate : (tan60^(@)-tan30^(@))/(1+tan60^(@) tan30^(@))+cos60^(@) cos30^(@)+sin60^(@) sin 30^(@) .

Find the value of cos60^(@) cos 30^(@)-sin 60^(@) sin 30^(@)

Find the value of sin60^(@)cos30^(@)+cos60^(@)sin30^(@) .

Find the value of sin60^(@)cos30^(@)+cos60^(@)sin30^(@) .

Prove that : cos30^(@).cos60^(@)-sin30^(@).sin60^(@)=0

Prove that : cos30^(@).cos60^(@)-sin30^(@).sin60^(@)=0

Prove that : sin60^(@)cos30^(@)+cos60^(@).sin30^(@)=1

Evaluate : (i) sin60^(@)*cos30^(@)-cos60^(@)*sin30^(@) (ii) tan30^(@)*cosec60^(@)+tan60^(@)*sec30^(@) .