Question

Jika cosec α = 3 dan α terletak dikuadran 1 , maka cos α adalah?

Answer 1

Cosec a = 3

cosec = 1/sin
sin = 1/cosec
sin = 1/3

sin = depan/miring

samping = √m² - d²
s = √9-1
s = 2√2

cos = s/m
cos = 2√2 / 3
cos a = ⅔√2