# Chapter 2 - Section 2.1 - Definition II: Right Triangle Trigonometry - 2.1 Problem Set - Page 63: 78

$150^{\circ}$

#### Work Step by Step

Given angle = $-210^{\circ}$ Angle coterminal with $-210^{\circ}$ between $0^{\circ}$ and $360^{\circ}$ will be- = $-210^{\circ} + 360$ = $150^{\circ}$

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