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OpenStudy (anonymous):
Find all solutions in the interval [0, 2π). cos x = sin x
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OpenStudy (cwrw238):
divide both sides by cos x to give tan x = 1
OpenStudy (anonymous):
okay got that
OpenStudy (cwrw238):
the tangent is positive in the first and 3rd quadrants
OpenStudy (anonymous):
so that gives me pi/4, 7pi/4?
OpenStudy (cwrw238):
pi/4 is correct
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OpenStudy (cwrw238):
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