document.write( "Question 1171886: 11. solve each of the following equations over all real numbers.
\n" ); document.write( "a. 2 cos x + squareroot3 = 0
\n" ); document.write( "b. 2sin^2 x - sin x - 1 = 0
\n" ); document.write( "c. sin(98t) + 2 = 1
\n" ); document.write( "d. 2sin^2 theta = 2 + cos2theta
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Algebra.Com's Answer #797049 by Boreal(15235)\"\" \"About 
You can put this solution on YOUR website!
cos x=-sqrt(3)/2
\n" ); document.write( "this occurs at (5/6)π=2πn and (7/6)π+/-2πn
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\n" ); document.write( "(2 sin x+1)(sin x -1)=0
\n" ); document.write( "sin x=1 and sin x=-1/2
\n" ); document.write( "π/2, 7π/6, 11π/6, with the +/-2πn
\n" ); document.write( "\"graph%28300%2C300%2C-6%2C6%2C-1%2C1%2C2%2A%28sin%28x%29%29%5E2-sin%28x%29-1%29\"
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\n" ); document.write( "2 sin^2 x=2+(1-sin^2 x)
\n" ); document.write( "3 sin^2x=3
\n" ); document.write( "sin^2x=1
\n" ); document.write( "x=π/2, and 3π/2 with +/-2πn
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