document.write( "Question 599013: If 2sin^2θ – cos^2θ = 2, then find the value of θ. \n" ); document.write( "
Algebra.Com's Answer #378761 by stanbon(75887)\"\" \"About 
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If 2sin^2θ – cos^2θ = 2
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\n" ); document.write( "2sin^2 - (1-sin^2) = 2
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\n" ); document.write( "3sin^2 = 3
\n" ); document.write( "sin^2 = 1
\n" ); document.write( "sin^2-1 = 0
\n" ); document.write( "(sin-1)(sin+1) = 0
\n" ); document.write( "sin(theta) = 1 or sin(theta) = -1
\n" ); document.write( "theta = pi/2 or -pi/2
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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