Answer:
C
Step-by-step explanation:
Using the cosine ratio in the right triangle and the exact value
cos45° = , then
cos45° = = = ( cross- multiply )
2s = 6 ( divide both sides by 2 )
s = 3 → C
Answer:
I got B, 42.
Step-by-step explanation: What I did was set up a proportion 1/4 = x/168, 1x168=168, 168/4=42.