Question

A 13-mater fire-truck ladder is leaning against a wall. Find the distance the ladder goes up the wall if it makes an angle of elevation of 43 degrees.

Answer 1

So to complete this you need to choose either sin cos or tan.

You know the hypotenuse and Ф but need to find the opposite.

So you would choose to use sin.

Opposite = sinФ * hypotenuse:
Opposite = sin43 * 13 = 8.9.

It would go 8.9 meters up the wall.

Hope this helps.