The vectors 42.0 cm at 15.0 and 23.0 cm at 65.0 both start from the origin. Both

Question:

The vectors 42.0 cm at 15.0° and 23.0 cm at 65.0° both start from the origin. Both angles are measured counterclockwise from the x axis. The vectors form two sides of a parallelogram.
(a) Find the area of the parallelogram.
(b) Find the length of its longer diagonal.