Question

A ladder leans against a vertical wall & its 9 meters up the wall. If the ladder is at an angle of elevation 60 degrees to the horizontal, how do you calculate the length of the ladder?

Answer 1

I tried this:

Explanation:

Have a look:

we can write:

`9=asin(60^@)`

rearranging:

`a=9/sin(60^@)=10.39~~10.4m`