document.write( "Question 1043022: Solve for x on the interval [0,2pi]. \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "cos^2(x)+3cos(x)+2=0\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Someone please help, this assignment is due tomorrow and I cannot find how to do this anywhere. \n" ); document.write( "

Algebra.Com's Answer #658099 by ikleyn(52884) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "

\r\n" );
document.write( " = \r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Factor left side\r\n" );
document.write( "\r\n" );
document.write( "(cos(x) + 1)*(cos(x) + 2) = 0.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Then the original equation deploys in two separate independent equations\r\n" );
document.write( "\r\n" );
document.write( "1.  cos(x) + 1 = 0  --->  cos(x) = -1  --->  x = ,  and\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "2.  cos(x) + 2 = 0  --->  cos(x) = -2,  which has no solutions.\r\n" );
document.write( "\r\n" );
document.write( "Answer.  x = .\r\n" );
document.write( "

\r
\n" ); document.write( "\n" ); document.write( "See the lessons in this site\r
\n" ); document.write( "\n" ); document.write( "    - Solving simple problems on trigonometric equations\r
\n" ); document.write( "\n" ); document.write( "    - Solving more complicated problems on trigonometric equations\r
\n" ); document.write( "\n" ); document.write( "    - Solving advanced problems on trigonometric equations\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "They teach you by examples on how to solve similar and other trigonometric equations.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );