Question

solve for the side
set up an equation, then solve for x. be accurate to within one decimal.

Explanation:

Step1: Use cosine function

$\cos(70^{\circ})=\frac{11}{x}$

Step2: Rearrange the equation

$x = \frac{11}{\cos(70^{\circ})}$

Step3: Calculate the value

$x=\frac{11}{0.342}\approx 11.7$

Answer:

$x\approx 11.7$