SOLUTION: Solve sqrt(2) cos(x) +1=0 for 0 <= x < 2pi
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Question 1033305: Solve sqrt(2) cos(x) +1=0 for 0 <= x < 2pi
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Solve sqrt(2) cos(x) +1=0 for 0 <= x < 2pi
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cos(x) = -1/sqrt(2)
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Reference angle:: pi/4
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Since cos is negative in QIII and QIV,
x = (3/4)pi or x = (5/4)pi
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cheers,
Stan H.
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