Answer:
22.64
Explanation:
You want the length of hypotenuse c in right triangle ABC with A=58° and b=12.
Cosine
The cosine relation is ...
Cos = Adjacent/Hypotenuse
cos(A) = b/c
c = b/cos(A) = 12/cos(58°) ≈ 22.64
The length of side c is about 22.64 units.
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