1. ABCD is a regular tetrahedron (right triangular pyramid). If M is the midpoint of \(\overline{CD}\), then what is \(\tan\angle AMB\)?

2. In the diagram below, we have \(\sin \angle RPQ = \frac{7}{25}\). What is \(\sin \angle RPS\)?

Please give an explnation because I just am having a hard time with trig. Thank you so much in advance.

Guest Aug 10, 2020