Nilai dari sin 150°+sin 120°/ cos 120° + cos 300°…

Sin 150° = Sin(180-30) = Sin 30°

Sin 120° = Sin(180-60) = Sin 60°

Cos 120° = Cos(180-60) = -Cos 60°

Cos 300° = Cos(360-60) = Cos 60°

Sin 150°+Sin 120°/ Cos 120° + Cos 300°

= Sin 30°+Sin 60°/-Cos 60°+Cos 60°

= ½+½√3 / -½+½

= ½+½√3 / 0

= Tak hingga ∞

sin 150° + sin 120°/cos 120° + cos 300°

= sin 270°/cos 420°

= -1/½

= -2