Question

Na figura, sen x 4/5 . Calcule x e y

Answer 1

sen α = 4/5

sen α = cateto oposto / hipotenusa

4/5 = 8 / x

4 * x = 5 * 8

4x = 40

x = 40/4

x = 10

x² = 8² + y²

(10)² = (8)² + y²

100 = 64 + y²

y² = 100 - 64

y² = 36

y = √ 36

y = 6