document.write( "Question 762213: Solve the equation on the interval [0,360degrees]
\n" ); document.write( "cos^2(t)+ 2cos(t)+1=0 help please so confused! \n" ); document.write( "

Algebra.Com's Answer #463764 by Cromlix(4381) $\"\"$ $\"About$

You can put this solution on YOUR website!
Cos^2t + 2cost + 1 = 0
\n" ); document.write( "(Cost + 1)(Cost + 1)= 0
\n" ); document.write( "Cost = -1
\n" ); document.write( " t = 180 degrees
\n" ); document.write( "Hope this helps.
\n" ); document.write( ":-) \n" ); document.write( "

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