document.write( "Question 816469: Use inverse trigonometric functions to find the solutions of the equation that are in the interval [0, 2π).You may enter an exact answer or round your solutions to four decimal places (this is best for this problem). (Enter your 4 answers in a comma separated list.)
\n" ); document.write( "cos(x)(15cos(x) + 7) = 3 \n" ); document.write( "

Algebra.Com's Answer #491554 by lwsshak3(11628) $\"\"$ $\"About$

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cos(x)(15cos(x) + 7) = 3
\n" ); document.write( "15cos^2(x)=3-7=-4
\n" ); document.write( "cos^2(x)=-4/15
\n" ); document.write( "no solution:
\n" ); document.write( "cos^2(x)≥0 \n" ); document.write( "

\n" );