Question

Determine o valor aproximado do seno, do cosseno e da tangente do ângulo idicado

Answer 1

Vamos lá

a)

hip² = 3.6² + 4,8² = 36, hip = 6

sen(x) = 4.8/6 = 0.8, cos(x) = 3,6/6 = 0.6 tg(x) = 4.8/3.6 = 4/3

b)

hip² = 5² + 5² = 25, hip = 5√2

sen(x) = √2/2, cos(x) = √2/2, tg(x) = 5/5 = 1

c)  

hip² = 5² + 5² = 25, hip = 5√2

7,4² = 7² + y²

y² = 54.76 - 49 = 5.76

y = 2.4

sen(x) = 2.4/7.4 = 0.324 , cos(x) = 7/7.4, = 0.945 tg(x) = 2.4/7 = 0.343

d)

hip² = 5² + y²

(17/3)² = (8/3)² + y²

y² = 289/9 - 64/9 = 225/9, y = 15/3

sen(x) = 15/17 = 0.882 , cos(x) = 8/17 = 0.470,  tg(x) = 15/8 = 1.875