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OpenStudy (anonymous):
Find all sollutions on [0,2pi): cosx=+/-1/sqrt(4)
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OpenStudy (psymon):
So cos(x) = 1/2 or -1/2. Well, there are two values where cos(x) = 1/2 and 2 values where cos(x) = -1/2. Do you have much knowledge of the unit circle?
OpenStudy (anonymous):
@shamim
OpenStudy (anonymous):
@zepdrix
OpenStudy (luigi0210):
At what values does cos=+/- 1/2?
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