document.write( "Question 904157: find exact values of s given interval [0, 2pi) ; cos^2 s=1/2 \n" ); document.write( "
Algebra.Com's Answer #548650 by lwsshak3(11628)\"\" \"About 
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find exact values of s given interval [0, 2pi) ;
\n" ); document.write( "cos^2 s=1/2
\n" ); document.write( "cos(s)=√(1/2)=√2/2
\n" ); document.write( "s=π/4, 7π/4 (in quadrants I and IV in which cos>0)
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