The value of the missing side is 14.7
Using trigonometric concept;
- cosine = Adjacent / Hypotenus
From the triangle;
- Length of side Adjacent to angle 30 is x
- Length of hypotenus of triangle is 17
Inputting our values into the expression :
cos(30) = x / 17
x = 17 × cos(30)
x = 17 × 0.8660
x = 14.722
The value of x to the nearest tenth is 14.7