Sin 60 derajat+ cos 120 derajat

sin 60 + cos 120
½√3 + (-½)
=½√3-½

semoga membantu

Sin 60 = 1/2 √3
Cos 120 = (180-60)
cos 60 = -1/2

Sin 60 + Cos 120
= 1/2 √3 + 1/2
= 1/2√3(-1+√3)