Buktikan identitas trigonometri berikut. 1+ tan² 30° = sec² 30°

buktikan identitas trigonometri berikut.

1+ tan² 30° = sec² 30°

Identitas Trigonometri
1/cos x = sec x

Akan dibuktikan nilai 1 + tan² 30° = sec² 30°
cos 30° = 1/2 √3

1 + tan² 30° = sec² 30°
1 + (1/√3)² = 1/(1/2 √3)²
1 + 1/3 = 1/(3/4)
4/3 = 4/3
terbukti