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Mathematics 14 Online
OpenStudy (anonymous):

cos inverse(cos(10pi/7))

OpenStudy (anonymous):

4pi/7

OpenStudy (anonymous):

thank you! how did you get that?

OpenStudy (anonymous):

trig identity of arcos(cos(x))=x 4pi/7 is the same as 10pi/7

OpenStudy (anonymous):

thank you!

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