Try this calculator if the other one doesn't work. The buttons are in different places but it works
Trigonometry is the study of triangles. In this section you must Master the following target skills:
Target 1: Use the Pythagorean theorem
Target 2: Use trig ratios (sin, cos, tan)
Target 3: Solve trig problems in real life context
Here are the links for the online discussion forum for this topic. Make sure you participate as your participation goes in as an assessment grade.