Hello, kelsey3!

A 12-foot solar panel is to be installed on a roof with a 15° pitch.

Find the length of the vertical brace if the panel

must make a 40° angle with the horizontal.Code:* B * |d 12 * * C * * | * * | * * 15° | A * - - - - - - - - - - - * D

The solar panel is: .

In right triangle

In right triangle

Substitute [2] into [3]: .

We have: .

Substitute [1] and [4] into [5]: .