document.write( "Question 849337: Find two values of θ, 0 ≤ θ < 2π, that satisfy the given trigonometric equation.
\n" ); document.write( "cos θ = − 1/2
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Algebra.Com's Answer #511521 by stanbon(75887) $\"\"$ $\"About$

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Find two values of θ, 0 ≤ θ < 2π, that satisfy the given trigonometric equation.
\n" ); document.write( "cos θ = − 1/2
\n" ); document.write( "---------
\n" ); document.write( "arccos(-1/2) = 180-60 = 120 degrees = (2/3)pi
\n" ); document.write( "---
\n" ); document.write( "OR
\n" ); document.write( "arccos(-1/2) = 180+60 = 240 degrees = (4/3)pi
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

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