For an angle with measure $\alpha$ in a right triangle, $\sin \alpha = \frac{5}{13}$ and $\tan \alpha = \frac{5}{12}$. What is the value of $\cos \alpha$?
ACT · Math · previous-year question
- A.$\frac{12}{13}$
- B.$\frac{12}{\sqrt{194}}$
- C.$\frac{12}{\sqrt{119}}$
- D.$\frac{13}{12}$
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