Q:

Stumped: Trapezoid problem with law of sin/cos ...

This one stumped me.
Thought you might enjoy..
What are the lengths of the diagonals?
It should be related to law of sine/cosine.
(The answers are in fraction)

A:

Hint:  If you cut off a parallelogram from the left, you get a triangle with a base of 3 and a top angle of (what?).  The law of sines then gives you the other two sides.  Then restore the parallelogram, draw the diagonals, and use the law of cosines.

