document.write( "Question 858255: Suppose sinθ = 1/4, and π/2 ≤ θ ≤ 2π. Find the exact value of cos θ. Explain steps please \n" ); document.write( "
Algebra.Com's Answer #517138 by lwsshak3(11628)\"\" \"About 
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Suppose sinθ = 1/4, and π/2 ≤ θ ≤ 2π. Find the exact value of cos θ. Explain steps please
\n" ); document.write( "Reference angle θ is in quadrant II in which cos<0
\n" ); document.write( "use x for θ\r
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "calculator check:
\n" ); document.write( "sin(x)=1/4
\n" ); document.write( "x≈165.52˚
\n" ); document.write( "cos(x)=cos(165.52)≈-0.9682…
\n" ); document.write( "exact value=-√15/4≈-0.9682… \n" ); document.write( "
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