New SAT Math - Calculator : Radians

Study concepts, example questions & explanations for New SAT Math - Calculator

varsity tutors app store varsity tutors android store

Example Questions

Example Question #64 : Unit Circle And Radians

Convert \(\displaystyle 52^{\circ}\) to radians.

Possible Answers:

\(\displaystyle \frac{\pi}{2}\)

\(\displaystyle \tfrac{13}{45}\pi\)

\(\displaystyle \frac{\pi}{5}\)

\(\displaystyle \frac{2\pi}{3}\)

\(\displaystyle \tfrac{17}{12}\pi\)

Correct answer:

\(\displaystyle \tfrac{13}{45}\pi\)

Explanation:

To convert between degrees and radians, multiply by \(\displaystyle \frac{\pi }{180^{\circ}}\) or \(\displaystyle \frac{180^{\circ}}{\pi}\).

Since we start in degrees, we use \(\displaystyle \frac{\pi }{180^{\circ}}\):

\(\displaystyle \frac{52^{\circ}}{1}\times\frac{\pi}{180^{\circ}}=\frac{52}{180}\pi\)

which simplifies to \(\displaystyle \tfrac{13}{45}\pi\).

Learning Tools by Varsity Tutors