document.write( "Question 593464: 3cos^2a+2=3-2cosa \n" ); document.write( "

Algebra.Com's Answer #376330 by lwsshak3(11628) $\"\"$ $\"About$

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3cos^2a+2=3-2cosa
\n" ); document.write( "3cos^2a+2cosa-1=0
\n" ); document.write( "(3cosa-1)(cosa+1)=0
\n" ); document.write( "..
\n" ); document.write( "3cosa-1=0
\n" ); document.write( "3cosa=1
\n" ); document.write( "cosa=1/3
\n" ); document.write( "a≈70.5º
\n" ); document.write( "or
\n" ); document.write( "cosa+1=0
\n" ); document.write( "cosa=-1
\n" ); document.write( "a=180º \n" ); document.write( "

\n" );