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3 years ago

Which calculation can be used to find the length of AC?

Mathematics

1 answer:

kolbaska11 [484]3 years ago

4 0

Answer:

D. 7.8 (Cos 23 degrees ) ft

Explanation:

The Cos ratio is adjacent/hypotenuse, which in this case uses the 7.8 ft as well as length AC. We can conclude that that will be our ratio.

cos23° = AC/7.8
7.8 (cos23°) = AC

Therefore your answer is D

Side note:

If we were to use angle 67°, we would have to use the Sin ratio (opposite/hypotenuse) to use length AC as well as 7.8 ft. However Sin67° was not an option and so that angle could be ruled out.

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