Question 17 Answer and Explanation _ACT December 2014 Form 72G Math Section

Question 17 Answer and Explanation _ACT December 2014 Form 72G Math Section

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17. For an angle with measure α in a right triangle, $sin\alpha=\frac{112}{113}$ and $tan\alpha=\frac{112}{15}$ . What is the value of cos α ?

A. $\frac{15}{113}$

B. $\frac{15}{112}$

C. $\frac{15}{\sqrt{25,313}}$

D. $\frac{15}{\sqrt{12,319}}$

E. $\frac{113}{15}$

Answer and Explanation

Your Answer is

Correct Answer is A

Explanation