document.write( "Question 655459: (a) Solve the equation on the given interval, expressing the solution for x in terms of inverse trigonometric functions. (Enter your answers as a comma-separated list.)
\n" ); document.write( "3(cos x)2 − 2 cos x − 1 = 0 on [π/2, π]
\n" ); document.write( " \n" ); document.write( "
Algebra.Com's Answer #409760 by lwsshak3(11628)\"\" \"About 
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(a) Solve the equation on the given interval, expressing the solution for x in terms of inverse trigonometric functions. (Enter your answers as a comma-separated list.)
\n" ); document.write( "3(cos x)2 − 2 cos x − 1 = 0 on [π/2, π]
\n" ); document.write( "**
\n" ); document.write( "3cos^2(x)−2cos(x)−1 = 0
\n" ); document.write( "(3cos(x)+1)(cos(x)-1)=0
\n" ); document.write( "..
\n" ); document.write( "3cos(x)+1=0
\n" ); document.write( "cos(x)=-1
\n" ); document.write( "arccos(-1)=π
\n" ); document.write( "..
\n" ); document.write( "cos(x)-1=0
\n" ); document.write( "cos(x)=1
\n" ); document.write( "arccos(1)=0 (no solution, not in domain)
\n" ); document.write( "..
\n" ); document.write( "x=π\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
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