The angle $\theta_1$ is located in Quadrant $\text{IV}$, and $\sin(\theta_1)=-\dfrac{13}{85}$ .
**What is the value of $\cos(\theta_1)$?**
*Express your answer exactly.*
$\cos(\theta_1)=$ [[☃ expression 1]]
Learn To Be brings free online tutoring students around the United States. Volunteer and gain community service hours while helping students who need it./p>