cos 90 dikali 30 + sin 90 dikali 30

Kelas 10 Matematika
Bab Trigonometri

(cos 90°) . 30 + (sin 90°) . 30
= (0 . 30) + (1 . 30)
= 0 + 30
= 30

cos 90 × 30 + sin 90 × 30
= (cos 90 × 30) + (sin 90 × 30)
= (0 × 30) + (1 × 30)
= 0 + 30
= 30