Question

Need some help with this one

Answer 1

17.5 ft

Explanation:

Given

`Ladder = 18ft`

`\theta = 76`

Required

The height which the ladder reaches on the wall

The question is illustrated with the attached image (solve for x).

Using sine formula, we have:

`\sin(76) = (x)/(18)` --- i.e. sin = opposite/hypotenuse

Make x the subject

`x = 18 * \sin(76)`

`x = 18 * 0.9703`

`x = 17.4654`

Approximate

`x = 17.5`