document.write( "Question 971834: Express cos 230 as a function of an acute angle \n" ); document.write( "
Algebra.Com's Answer #594226 by Boreal(15235)\"\" \"About 
You can put this solution on YOUR website!
cos (230)=-(cos (50) =-0.643\r
\n" ); document.write( "\n" ); document.write( "Cosine is negative in the second and third quadrants.
\n" ); document.write( "
\n" );