Question

Find 0. Round to the nearest degree

A. 26
B. 66
C. 64
D. 24

Answer 1

Answer: Choice C) 64 degrees

Work Shown:

`\cos(\theta) = \frac{\text{adjacent}}{\text{hypotenuse}}\\\\\cos(\theta) = (7)/(16)\\\\\cos(\theta) = 0.4375\\\\\theta = \cos^(-1)(0.4375)\\\\\theta \approx 64.0555^(\circ) \\\\\theta \approx 64^(\circ) \\\\`

Note: some calculators will use the notation arccos in place of the
`\cos^(-1)`

Answer 2

C. 64°

Explanation:

`{ \tt{ \cos( \theta) = (adjacent)/(hypotenuse) }} \\ \\ { \tt{ \cos( \theta) = (7)/(16) }} \\ \\ { \tt{ \theta = { \cos }^( - 1) ( (7)/(16) )}} \\ \\ { \tt{ \theta = 64 \degree}}`