Free SAT Practice Questions

Question 1 of 1
ID: SAT-ATIM-7
Section: Math - Additional Topics in Math
Topics: Trigonometry; Conversion
Difficulty level: Easy

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Which of the following is equivalent to the value of $\left({\dfrac{5\pi }{9}}^c+{\dfrac{13\pi }{18}}^c-{\dfrac{17\pi }{6}}^c\right)$ when converted to degrees? (with calculator)

A${20}^\circ$
B${80}^\circ$
C${280}^\circ$
D${320}^\circ$