document.write( "Question 493016: Find all t in the interval [0, 2π] satisfying (cos t)2 + 4 cos t + 3 = 0. (Enter your answers as a comma-separated list.) \n" ); document.write( "
Algebra.Com's Answer #335238 by Alan3354(69443)\"\" \"About 
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Sub x for cos(t)
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\n" ); document.write( "Sub cos(t) for x.
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