putaran 90 derajat

1/9 putaran = (1/9) (360°) = 40° 1/9 putaran = (1/9) (2π) = 2/9 π rad. Kasus b. 3/8 putaran = (3/8) (360°) = 135° 3/8 putaran = (3/8) (2π) = 3/4 π rad. Kasus c. 1/5 putaran = (1/5) (360°) = 72° 1/5 putaran = (1/5) (2π) = 2/5 π rad. Baca juga: Soal Trigonometri Tentang Hubungan Perbandingan Sudut injeksi im berapa derajat