Question 33 Answer and Explanation _ACT October 2014 Asia Form 70B Math Section

Question 33 Answer and Explanation _ACT October 2014 Asia Form 70B Math Section

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33. As shown below, a straight slide in a water park is 42 feet long and is built over a distance of 39 feet along level ground. Which of the following expressions equals the measure of the acute angle that the slide makes with the ground?

A. ${sin}^{-1}\left({\frac{39}{42}}\right)$

B. ${sin}^{-1}\left({\frac{42}{39}}\right)$

C. ${cos}^{-1}\left({\frac{39}{42}}\right)$

D. ${cos}^{-1}\left({\frac{42}{39}}\right)$

E. ${tan}^{-1}\left({\frac{42}{39}}\right)$

Answer and Explanation

Your Answer is

Correct Answer is C

Explanation