Diego has a 6 foot ladder. He places it against a wall so that the angle it forms with the ground is equal to 30 degrees.

A.) How high off of the ground is the top of Diego's ladder? [Use sine or cosine to relate the angle, the ladder's length, and the unknown length.]

B.) How far away from the wall is the foot of the ladder?

C.) Diego decides to move the ladder so that the angle it forms with the ground is now equal to 15 degrees. Approximately how high off of the ground is the top of his ladder now?