document.write( "Question 453044: If cos £ = -4/5 for £ in Quadrant II, find sin £/2. \n" ); document.write( "
Algebra.Com's Answer #311384 by stanbon(75887)\"\" \"About 
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If cos £ = -4/5 for £ in Quadrant II, find sin £/2.
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\n" ); document.write( "sin(L/2) = sqrt[(1-cos(L))/2]
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\n" ); document.write( "= sqrt[(1+(4/5))/2]
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\n" ); document.write( "= sqrt[(9/5)/2]
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\n" ); document.write( "= sqrt[0.9]
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\n" ); document.write( "~ 0.9487
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "
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