Question #9e311

1 Answer
Nghi N
Dec 5, 2017

#124^@75; 235^@25#

Explanation:

cos x = - 0.57
Calculator and unit circle give 2 solutions:
#x = +- 124^@75#
The arc (- 124.75) is co-terminal to arc (360 - 124.75 = 235.25)
Answers for (0, 360):
#124^@75, and 235^@25#

Related questions
Impact of this question
221 views around the world
You can reuse this answer
Creative Commons License