Question

Please help! Urgent!

Answer 1

x = 10

Explanation:

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

cos60° =
`(1)/(2)` , then

cos60° =
`(adjacent)/(hypotenuse)` =
`(5)/(x)` =
`(1)/(2)` ( cross- multiply )

x = 5 × 2 = 10