tentukan nilai dari sin² 120 derajat + cos² 120 derajat

jawaban terlampir ya kak, semoga membantu

Sin = 120 = {(1+2)0} = cos 30° = 1/2√3
Cos = 120 = {(1+2)0} = sin 30° = 1/2

= (1/2√3)²+(1/2)²
= ( 1/2 (3) 1/2 ) + (1/2 . 1/2 )
= 3/2 + 1/4 = 4/6