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Mathematics 19 Online
OpenStudy (anonymous):

Find the exact value of cos 3 pi/4 and sin 3pi/4?

jimthompson5910 (jim_thompson5910):

use this unit circle http://www.regentsprep.org/Regents/math/algtrig/ATT5/600px-Unit_circle_angles_svg.jpg

OpenStudy (anonymous):

Thanks so much :)

jimthompson5910 (jim_thompson5910):

np

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