Question 45 Answer and Explanation _ACT December 2009 Form 68A Math Section

Question 45 Answer and Explanation _ACT December 2009 Form 68A Math Section

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Use the following information to answer questions 44-46.

The points A(4, 7) , B(3,12), C(7, 7), and D(7, 14) are shown in the standard (x, y) coordinate plane below.

45. What is the cosine of the smallest angle in right triangle ΔACD?

A. $\frac{7}{\sqrt{58}}$

B. $\frac{7}{10}$

C. $\frac{3}{\sqrt{58}}$

D. $\frac{4}{7}$

E. $\frac{\sqrt{58}}{10}$

Answer and Explanation

Your Answer is

Correct Answer is A

Explanation