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Korolek [52]
2 years ago
12

Find the value of the cosine for ZA.

Mathematics
1 answer:
baherus [9]2 years ago
5 0

Answer:

C. \frac{8\sqrt{89}}{89}

Step-by-step explanation:

Cos A = Adj/Hyp

Reference angle = <A

Adjacent side = 8 ft

Hypotenuse = √(8² + 5²) = √89 (pythagorean theorem)

Thus:

Cos (A) = \frac{8}{\sqrt{89}}

Rationalize

Cos (A) = \frac{8 * \sqrt{89}}{\sqrt{89} * \sqrt{89}}

Cos (A) = \frac{8\sqrt{89}}{89}

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