Algebra.Com's Answer #424219 by Alan3354(69443)![\"\"](\"/images/stars/stars-13.gif\")  
You can put this solution on YOUR website!
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document.write( "cos^2 = 1 - sin^2
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document.write( "sub y for sin(x)
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document.write( " | Solved by pluggable solver: SOLVE quadratic equation (work shown, graph etc) | \n" );
document.write( "Quadratic equation  (in our case  ) has the following solutons:
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document.write( " For these solutions to exist, the discriminant  should not be a negative number.
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document.write( " First, we need to compute the discriminant :  .
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document.write( " Discriminant d=25 is greater than zero. That means that there are two solutions:  .
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document.write( " Quadratic expression  can be factored:
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document.write( " Again, the answer is: 0.5, -2.\n" );
document.write( "Here's your graph:
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document.write( "sin(x) = -2, ignore, no real numbers.
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document.write( "sin(x) = 0.5
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document.write( "x = pi/6 + 2n*pi, n = 0,1,2,3
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document.write( "x = 5pi/6 + 2n*pi, n = 0,1,2,3
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