document.write( "Question 755347: what values for θ (0≤θ≤2π)satisfy the equation 2 cosθ+1=- cos θ. \n" ); document.write( "

Algebra.Com's Answer #459610 by Cromlix(4381) $\"\"$ $\"About$

You can put this solution on YOUR website!
2 cosθ+1=- cos θ.
\n" ); document.write( "2 cos theta + 1 + cos theta = 0
\n" ); document.write( "3 cos theta + 1 = 0
\n" ); document.write( " 3 cos theta = -1
\n" ); document.write( " cos theta = -1/3
\n" ); document.write( "Cos is negative in the second
\n" ); document.write( "and third quadrants
\n" ); document.write( " theta = 1.9 and 4.4 radians
\n" ); document.write( "Hope this helps
\n" ); document.write( ":-)
\n" ); document.write( " \n" ); document.write( "

\n" );