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[" Whe the the cose "30^(@)-sin^(2)60^(@...

[" Whe the the cose "30^(@)-sin^(2)60^(@)],[" T] "]

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The value of sin^(2)60^(@)-sin^(2)30^(@) is:

Show that : cos^(2)60^(@)-sin^(2)60^(@)=-sin30^(@)

Show that : cos^(2)60^(@)-sin^(2)60^(@)=-sin30^(@)

The value of sin^2 60^@ -sin^2 30^@

If A=30 ^(@) then show that sin ( 60 ^(@) +A) - sin (60 ^(@) - A) = sin A

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

Prove that : sin60^(@)=2sin30^(@)cos30^(@) .

Prove that : sin60^(@)=2sin30^(@)cos30^(@) .

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

The value of cos60^(@)cos30^(@)-sin60^(@)sin30^(@) is equal is…………..