Question

Write your answer in simplest radical form​

Answer 1

a = 4
`√(3)`

Explanation:

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

cos60° =
`(1)/(2)` , then

cos60° =
`(adjacent)/(hypotenuse)` =
`(2√(3) )/(a)` =
`(1)/(2)` ( cross- multiply )

a = 4
`√(3)`