document.write( "Question 869271: I have to solve 3cosx = cosx -1 in the interval 0≤x<2π \n" ); document.write( "
Algebra.Com's Answer #524103 by lwsshak3(11628)\"\" \"About 
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solve 3cosx = cosx -1 in the interval 0≤x<2π
\n" ); document.write( "3cosx = cosx -1
\n" ); document.write( "2cosx = -1
\n" ); document.write( "cos x=-1/2
\n" ); document.write( "x=5π/6, 7π/6 (In quadrants II and III in which cos<0)
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