https://prnt.sc/qpagnb
Hypotenuse (from pythag theorem) = sqrt 80
Tan A = opp/adj = 4/8 = 1/2
Sec a = 1/cos a = 1 /(adj/hyp) = hyp/adj = sqrt 80 / 8 = 4 sqrt 5 / 8 == sqrt5 / 2
sin a = opp/hyp =4/sqrt80 1/sqrt 5 = sqrt5/ 5
+36916 
