Question

cum se calculeaza sin de 120 de grade ?

Answer 1

$sin120^{\circ} =sin(60^{\circ} +60^{\circ} )=2sin60^{\circ} cos60^{\circ} = \not2* \frac{ \sqrt{3} }{\not2} * \frac{1}{2} = \frac{ \sqrt{3} }{2}$