Trigonometry (10th Edition)

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

Chapter 1 - Test - Page 44: 18

Answer

cotangent and cosecant

Work Step by Step

1. The negative x axis represents the angles of 180 degrees 2. When your angle is 180, value of y is zero. This means anything with y denominator will be undefined trig function. Those functions are cotangent and cosecant, that have y at the denominator.
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