Question

30
20
Y
Find x

Can someone please help me

Answer 1

B

Explanation:

Using the cosine ratio in the right triangle and the exact value

cos30° =
`(√(3) )/(2)` , then

cos30° =
`(adjacent)/(hypotenuse)` =
`(x)/(20)` =
`(√(3) )/(2)` ( cross- multiply )

2x = 20
`√(3)` ( divide both sides by 2 )

x = 10
`√(3)` → B