ACT 2021 April(Z04) Math Question 59 Explanation - ACT Helper

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2021 April(Z04) Math Question 59
Trigonometry
- Pythagorean Theorem & sin cos tan
Sum of angles of a triangle, The law of sines & The law of cosines
Choice B
$\frac{240}{s i n (180 ° - 75 ° - 45 °)} = \frac{S t r i n g}{s i n 45 °}$
$∴ S t r i n g = 240 \times \frac{s i n 45 °}{s i n 60 °} = 80 \sqrt{6}$
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