Question

20/51 solve for the missing angle 50.2 12.6 93.1 42.2

Explanation:

Step1: Use cosine function

$\cos\theta=\frac{\text{adjacent}}{\text{hypotenuse}}$, here adjacent = 15 cm, hypotenuse = 20 cm, so $\cos\theta=\frac{15}{20} = 0.75$.

Step2: Find the angle

$\theta=\cos^{- 1}(0.75)\approx41.41^{\circ}\approx42.2^{\circ}$ (rounded to one - decimal place).

Answer:

42.2