Jika (tan beta)² / 1 + sec beta = 1,0°

Jika (tan beta)² / 1 + sec beta = 1,0° < beta < 90° hitunglah nilai beta

Jawaban
tan b)² = sec² b – 1
sec² b – 1 / sec b + 1 = 1
(sec b + 1)(sec b – 1) / sec b + 1 = 1
sec b – 1 = 1
sec b = 2
b = 60°

Dijawab Oleh : Kunjaw