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OpenStudy (anonymous):
Solve the equation for the interval [0,360). 10sec²+sec+4=0
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OpenStudy (agent0smith):
First notice that it looks like a quadratic equation... let x = sec, then you can write: \[10x^2+x+4 = 0\]And try to factor it, or use the quadratic formula to find x, then sec.
OpenStudy (agent0smith):
Looks like your only solutions will be complex numbers...
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