document.write( "Question 1027213: Solve the interval 0\n" ); document.write( "

Algebra.Com's Answer #643177 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
Substitute $\"u=cos%28theta%29\"$
\n" ); document.write( " $\"u%5E2%2B2u%2B1=0\"$
\n" ); document.write( " $\"%28u%2B1%29%5E2=0\"$
\n" ); document.write( " $\"u%2B1=0\"$
\n" ); document.write( " $\"u=-1\"$
\n" ); document.write( " $\"cos%28theta%29=-1\"$
\n" ); document.write( " $\"theta=pi\"$
\n" ); document.write( " \n" ); document.write( "

\n" );