3sin30^(@)-4sin^(3)60^(@)

What will be the value of 3sin30^(@)-4sin^(3)30^(@) ?

The value of 3sin 30^(@)-4sin^(3)30^(@) is :

The value of 3sin30^(0)-4sin^(3)30^(@)+4cos^(3)30^(0)-3cos30^(@)

If A=30^(@) , show that : sin3A=4sinAsin(60^(@)-A)sin(60^(@)+A)

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

Evaluate : (i) sin^(2)30^(@)-2cos^(3)60^(@)+3tan^(4)45^(@) (ii) (cos0^(@)+sin45^(@)+sin30^(@))(sin90^(@)-cos45^(@)+cos60^(@))

sin60^(@)*sec^(2)45^(@)-3tan30^(@).4sin60^(@)=

4sinA.sin(60^(@)+A)sin(60^(@)-A)=sin3A

4sinA.sin(60^(@)+A)sin(60^(@)-A)=sin3A

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