Chapter 14 Trigonometric Graphs, Identities, and Equations - 14.5 Write Trigonometric Functions and Models - 14.5 Exercises - Mixed Review - Page 947: 36

$-\dfrac{\sqrt 3}{2}$

The Trigonometric Identities are written below: $\sin \theta=\dfrac{Opposite}{Hypotenuse}$ $\cos \theta=\dfrac{Adjacent}{Hypotenuse}$ $\tan \theta=\dfrac{Opposite}{Adjacent}$ $\csc \theta=\dfrac{Hypotenuse}{Opposite}$ $\sec \theta=\dfrac{Hypotenuse}{Adjacent}$ $\cot \theta=\dfrac{Adjacent}{Opposite}$ Hence, our required answer is: $-\dfrac{\sqrt 3}{2}$