Question

alguém me ajudaaa pfvr para agora​

Answer 1

a)

Sen 30° = 7/b
1/2 = 7/b
b = 14

b)

Sen y = 10/2√41
Sen y = 5√41

Cos x = 10/2√41
Cos x = 5√41

c)

Sen 60° = 80/x
√3/2 = 80/x
x√3= 160
x = 160/√3
x = 160/√3 × √3/√3
x = 160√3/3

d)

Cos x = 7/12

e)

Sen 30° = 4/x
1/2 = 4/x
x = 8

Cos 30° = y/8
√3/2 = y/8
8√3 = 2y
y = 8√3/2
y = 4√3

f)