To the nearest degree, what i’d the measure of angle Z? A. 30 B. 32 C. 47 D. 49

asked Jul 17, 2021 122k views

3 votes

To the nearest degree, what i’d the measure of angle Z?

A. 30
B. 32
C. 47
D. 49

5.1k points

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6 votes

Answer:

Explanation:

Using the cosine rule

cosZ =
(7^2+8^2-6^2)/(2(7)(8)) =
(49+64-36)/(112) =
(77)/(112) , thus

Z =
cos^(-1) (
(77)/(112) ) ≈ 47° ( to the nearest degree ) → C

Manoji Stack answered Jul 23, 2021

4.5k points

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