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OpenStudy (anonymous):
sec^2x+2sec=0
solve the equation for 0
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OpenStudy (callisto):
sec^2x+2secx=0 secx ( secx +2) =0 secx =0 (rejected) or secx+2 =0 secx =-2 1/cosx =-2 cos x = -1/2 x = 2pi / 3 or x = 4pi/3
OpenStudy (anonymous):
thank you! :)
OpenStudy (callisto):
welcome :)
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