Question

Find the measure of x.

40
45°
X
x = [?]
X
Round to the nearest tenth.

Answer 1

x ≈ 28.3

Explanation:

using the cosine ratio in the right triangle

cos45°=
`(adjacent)/(hypotenuse)` =
`(x)/(40)` ( multiply both sides by 40 )

40 × cos45° = x , then

x ≈ 28.3 ( to the nearest tenth )