document.write( "Question 806543: Find the exact value of s in the interval [0,pi2] if cos s=0.7826 \n" ); document.write( "
Algebra.Com's Answer #485899 by Edwin McCravy(20065)\"\" \"About 
You can put this solution on YOUR website!
You can't get the exact value for it is irrational and cannot
\n" ); document.write( "be expressed in radicals and integers. \r
\n" ); document.write( "\n" ); document.write( "It's approximately 0.671964864979 radians.
\n" ); document.write( "
\n" );