Question

Hi I’m not sure if I got this answer right, please help and thank you

Answer 1

From the triangle, we identify the trigonometric function:

`\cos 30\degree=(x)/(10)`

But we know that:

`\cos 30\degree=\frac{\sqrt[]{3}}{2}`

Then:

`\begin{gathered} \frac{\sqrt[]{3}}{2}=(x)/(10) \\ x=(10)/(2)\sqrt[]{3} \\ \therefore x=5\sqrt[]{3} \end{gathered}`