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SAT® Subject Test in Math 1 & 2

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Moderate

Equivalent Reciprocal Trig Ratios

SATSTM-DV5G1N

Which one of the following could $x$ not equal for the equation below?

$$\csc\left(\cfrac{5\pi}{6}\right)=\csc(x)$$

A

$-\cfrac{7\pi}{6}$

B

$\cfrac{\pi}{6}$

C

$-\cfrac{\pi}{6}$

D

$\cfrac{13\pi}{6}$

E

$-\cfrac{19\pi}{6}$