document.write( "Question 925757: Solve the following equation.
\n" ); document.write( "(Enter your answers as a comma-separated list. Let k be any integer. Enter DNE is there is no solution.)
\n" ); document.write( "2 cos 2θ − 1 = 0\r
\n" ); document.write( "\n" ); document.write( "(a) Find all solutions of the equation.
\n" ); document.write( "θ = \r
\n" ); document.write( "\n" ); document.write( "(b) Find the solutions in the interval [0, 2π).
\n" ); document.write( "θ = \r
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\n" ); document.write( "\n" ); document.write( "THANKS \n" ); document.write( "
Algebra.Com's Answer #561741 by ewatrrr(24785)\"\" \"About 
You can put this solution on YOUR website!
2 cos 2θ − 1 = 0
\n" ); document.write( "cos x = 1/2
\n" ); document.write( "x = π/3 , 5π/3 (See Below)
\n" ); document.write( "2θ = x
\n" ); document.write( "θ = x/2
\n" ); document.write( "θ = π/6 + 2kπ , 5π/6 + 2kπ
\n" ); document.write( ".......
\n" ); document.write( "(b) Find the solutions in the interval [0, 2π).
\n" ); document.write( "θ = π/6 , 5π/6
\n" ); document.write( "..........
\n" ); document.write( "(cosx, sinx) Summary Unit Circle
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