Question

Hello there.
And I have a little problem about sine law problems.
And I seem I can't get the right answer.
So here's the question:
As you walk on a straight level path toward a mountain, the measure of the angle of elevation to the peak of the mountain from one point is 33 degrees. From a point 1000 ft closer, the angle of elevation is 35 degrees. How high is the mountain?

Thanks in advance.