1. Solving a right triangle means to find all of its missing sides and angles.

2. O
___ A 16 20 4 5 __
(4/5)
(4/5)
38.7° (angles are typically rounded to the tenth)
38.7°
tanθ = O __ A
tanC = 20
___ 16
C = tan-1(5/4)
C ≈ 51.3°

3. sin-1(0.76)
cos-1(0.17)
49.5°
80.2°

4. 180°
67°
sine
sin23°
40 × sin23°
skip this step
15.629ft
cosine
cos23°
40 × cos23°
skip this step
36.820ft
23° 67° °
36.8

5. O
___ A
tanθ =
tanx° = 4 96
x = tan-1(4/96)
x ≈ 2.4°
2.4° is less than