Tolong dong jawabannya KK…
Jawaban:
4π/6 = ⅔.π = ⅔. 180 = 120°
sin 4π/6 =sin 120 = sin (180 -60)
= sin 60=½√3
cos 4π/6 =cos 120 = cos(180 -60)
= -cos 60= -½
tan 4π/6 =tan 120 = tan(180 -60)
= – tan 60= -√3
sin 150+cos330-tan225 =
sin 30 + cos 30 – tan 45 =
½ + ½√3 – 1 =