Answer:
∅ = 40.3°
General Formulas and Concepts:
Trigonometry
- cos∅ = adjacent over hypotenuse
Step-by-step explanation:
Step 1: Define
Looking for m∠A
Step 2: Identify
adjacent leg of ∠A = AC = 7.4
hypotenuse = AB = 9.7
Step 3: Find theta
- Substitute: cos∅ = 7.4/9/7
- Take trig inverse: ∅ = cos⁻¹(7.4/9.7)
- Evaluate: ∅ = 40.2807°
- Round: ∅ = 40.3°
