document.write( "Question 924585: solve the equation:\r
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\n" ); document.write( "\n" ); document.write( "4 cos^2 x - 1 = 0 \n" ); document.write( "
Algebra.Com's Answer #560970 by ewatrrr(24785)\"\" \"About 
You can put this solution on YOUR website!
 
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document.write( "Hi,
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document.write( "sin x(sin x + 1) = 0 
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document.write( "sin^2 x + sinx = 0
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document.write( "sin^2x = - sinx
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document.write( "sinx = -1
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document.write( "....
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document.write( "4 cos^2 x - 1 = 0
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document.write( "cos^2 x = 1/4
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document.write( "cosx  = ± 1/2
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document.write( "....
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document.write( "refer to (cosx, sinx) Summary Unit Circle for corresponding x-values
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