If b = 9 and c = 13, what is the measure of ∠a? (round to the nearest tenth of a degree)

a) 34.7°

b) 41.2°

c) 46.2°

d) 49.5°

e) 55.3°

C)46.2°

Step-by-step explanation:

cos theta = adjacent side/ hypotenuse

cos A = b/c

cos A = 9/13

Taking the inverse cosine of each side

cos^-1 (cosA) = cos^-1 (9/13)

A = 46.18693854

A = 46.2 degrees

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