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1. Which of the following formulas can be used to solve for the measure of ZA
in AABC?
6²+0 ²40²
6²+0²-g²
I.
12--2-a?
COS A =
II. cos A =
III. COS A =
2bc
abc
2bc
A. Only I
B. Only II
C. Only III
D. I, II, and III​