Question

me ajudem, pls!
aaaaaaaa​

Answer 1

a) cos 30= 16/x

cos 30= √3/2

√3/2=16/z

√3(x)=16(2)

x=32/√3 (√3/√3)

x= 32√3/3

$x = \frac{32 \sqrt{3} }{3}$

b) sen y = 13/26

sen y = 1/2

sen 30 = 1/2

sen y = sen 30

y = 30º

c) cos 45 = 20/z

cos 45 = √2/2

√2/2 = 20/z

√2(z) = 20(2)

z= 40/√2 (√2/√2)

z= 40√2/2

z= 20√2