Trigonometry (10th Edition)

Published by Pearson
ISBN 10: 0321671775
ISBN 13: 978-0-32167-177-6

Chapter 1 - Test: 10c

Answer

$90^{\circ}$

Work Step by Step

1. Subtract 360 degrees twice to get smallest positive coterminal angle $810^{\circ}-720^{\circ}=90^{\circ}$
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