Answer:
A = 48°
b = 13.5
c = 20.2
Step-by-step explanation:
✔️A = 180° - (90° + 42°) (sum of triangle)
A = 48°
✔️To find b and c, apply trigonometric function.
Reference angle = 42°
Opposite = b
Hypotenuse = c
Adjacent = 15
✅Apply TOA to find b:
Tan 42 = Opp/Adj
Tan 42 = b/15
15 × Tan 42 = b
13.5060607 = b
b = 13.5 (nearest tenth)
✅Apply CAH to find c:
Cos 42 = Adj/Hyp
Cos 42 = 15/c
c × Cos 42 = 15
c = 15/Cos 42
c = 20.1844909
c = 20.2 (nearest tenth)
