Question

Vale 15 pontos ajuda

Answer 1

a)

Cos 30° = 16/x

√3/2 = 16/x

x√3 = 32

x = (32/√3).(√3/√3)

x = (32√3)/3

b)

Sen Y = 13/26

Sen Y = 1/2

Sen 30° = 1/2

Y = 30°

c)

Sen 60° = w/18

√3/2 = w/18

2w = 18√3

w = (18√3)/2

w = 9√3

d)

Cos 45° = 20/z

√2/2 = 20/z

z√2 = 40

z = (40/√2).(√2/√2)

z = (40√2)/2

z = 20√2

Answer 2

a)

Cos 30° = 16/x

√3/2 = 16/x

x√3 = 32

x = (32/√3).(√3/√3)

x = (32√3)/3

b)

Sen Y = 13/26

Sen Y = 1/2

Sen 30° = 1/2

Y = 30°

c)

Sen 60° = w/18

√3/2 = w/18

2w = 18√3

w = (18√3)/2

w = 9√3

d)

Cos 45° = 20/z

√2/2 = 20/z

z√2 = 40

z = (40/√2).(√2/√2)

z = (40√2)/2

z = 20√2