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Mathematics 33 Online
OpenStudy (anonymous):

find the exact value cos(7pi/8) the answer from the exam review shows the following... -sqrt(2-sqrt(2)/4)

OpenStudy (solomonzelman):

pi is 180, so (7/8) * 180.

OpenStudy (solomonzelman):

157.5

OpenStudy (solomonzelman):

Find the cosine of that.

OpenStudy (anonymous):

wouldnt use the addtion or subtraction cos formula? Made a error it should say "Find the exact solution"

OpenStudy (solomonzelman):

|dw:1383695282299:dw|

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