ACT 2021 December(E23) Math Question 58 Explanation - ACT Helper

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2021 December(E23) Math Question 58
Trigonometry
- Pythagorean Theorem & sin cos tan
The law of sines & The law of cosines
Choice K
$a^{2} = b^{2} + c^{2} - 2 b c c o s A$
$15^{2} = 16^{2} + 17^{2} - 2 (16) (17) c o s A$
Skills you are tested for:
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