Question

Help me plss I don’t understand Find K. Write your answer in simplest radical form.

Answer 1

k = 36
`√(3)`

Explanation:

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

cos60° =
`(1)/(2)` , then

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

k = 2 × 18
`√(3)` = 36
`√(3)`