cosec 30 + cosec 60 + 90 sec 0 + sec 30 + sec 60

Kelas 10 Matematika
Bab Trigonometri

cosec 30° + cosec 60 + 90 . sec 0° + sec 30° + sec 60°
= 1/sin 30° + 1/sin 60° + 90 . 1/cos 0° + 1/cos 30° + 1/cos 60°
= 2 + 2/3 √3 + 90 . 1 + 2/3 √3 + 2
= 94 + 4/3 √3