Question

Determine o valor das incógnitas:

Answer 1

cos30= cateto adjacente/hipotenusa
√3/2 = 7/y
y= 7/(√3/2)
y=14/√3 --> Racionalizando
y=(14√3)/3

Teorema de pitagoras:

y²=7²+x²
(14√3/3)²=49+x²
196.3/9=49+x²
196/3-49=x²
x²=(196-147)/3
x=√(49/3)
x=7/√3 ---> Racionaliza
x=7√3/3