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" 3) "sin60^(@)...

" 3) "sin60^(@)

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"(1) "sin60^(@)cos30^(@)+sin30^(@)cos60^(@)

If 4 sin(60^(@) + theta ) sin (60^(@) - theta )-1=k cos 2 theta , the value of k is

Prove that: sin A sin(60^(@)-A)sin(60^(@)+A)=(1)/(4)sin3A

Show that 4 sin A sin (60^(@)+A). Sin (60^(@)-A) =sin 3A

If sin A sin (60^(@)-A)sin(60^(@)+A)=ksin3A , then what is k equal to ?

sin (60^(@) + theta) - sin ( 60^(@) - theta ) = sin theta.

Find the value of sin60^(@) geometrically.

Find the value of sin60^(@) geometrically.

cos^(-1) sin (-60^(@))