12.
sin(28) = 0.4694...
8/0.4694... = 17.0404...(That is the scale factor)
tan(28) = 0.5317...
17.0404... X 0.5317.... = 9.0605... ~ 9
13.
tan(37) = 0.75355...
5/ 0.75355... = 6.635...(SC)
sin(37) = 0.60181...
0.60181... X 6.635... = 3.9931... ~ 4
14.
∠E = 37
cos(37) = 0.7986...
8/0.7986... = 10.0170...(SC)
tan(37) = 0.75355..
10.0170... X 0.75355... = 7.5484... ~ 8
