Question

Calcule o valor das letras nas figuras abaixo:

Answer 1

a) sen45° = h/50

√2/2 = h/50

2h = 50√2

h = 25√2


b)sen60 = x/7√3

√3/3 = x/7√3

3x = 7√3√3

3x = 7.3

x = 7


c) tg60 = 180/x

√3 = 180/x

x√3 = 180

x = 180/√3 . √3/√3

x = 180√3/3

x = 60√3


sen60 = 180/y

√3/3 = 180/y

y√3 = 3.180

y = 3.180/√3 . √3/√3

y = 3.180.√3/3

y = 180√3



d) sen30 = 20/x

1/2 = 20/x

x = 2.20

x = 40


tg30 = 20/y

√3/3 = 20/y

y√3 = 3.20

y = 3.20/√3 . √3/√3


y = 3.20.√3/3

y = 20√3