Question

If a=22.3 and B=47º18', find c.

Answer 1

D is correct Answer:

Explanation:

edge

Answer 2

D. 32.9

Explanation:

Using trigonometric ratio, Cosine

Cosine = Adjacent/Hypotenuse

Therefore;

Cos B = a/c

but a = 22.3

B = 47° 18' , but 1° = 60'

Therefore, B = 47.3°

Thus;

Cos 47.3° = 22.3/ c

c = 22.3/Cos 47.3°

= 32.88

≈ 32.9