Answer: A) Law of Sines
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Explanation:
You use the law of sines because we can form this equation
sin(A)/a = sin(B)/b
and it updates to
sin(45)/13 = sin(B)/28
If you try to solve for B, then you'd find that no solutions are possible. Therefore, we cannot form a triangle with these given parameters.
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To be able to use the law of cosines, we would need to know info about angle C which is between sides a and b.
To be able to use the law of tangents, we would need to know at least two angles. Unfortunately, we only have info about one angle.
There's no such thing as "the law of trigonometry". The wording is too vague.
