prove that
A) sin60°cos30°-sin30°cos60°=sin30°
sin60°cos30°-sin30°cos60°=sin30°
(sqrt(3)/2)(sqrt(3)/2) - (1/2)(1/2) = (1/2)
(3/4) - (1/4) = (1/2)
Which is true.....
\(\sin{(60^{\circ})}\cdot \cos{(30^{\circ})} - \cos{(60^{\circ})}\cdot \sin{(30^{\circ})} = \sin{( 60^{\circ} - 30^{\circ} )} = \sin{( 30 ^{\circ} )}\)
