document.write( "Question 1195997: cos(2\alpha +(\pi )/(4))=3tan(2\alpha +(\pi )/(4)) \n" ); document.write( "
Algebra.Com's Answer #828652 by greenestamps(13200)\"\" \"About 
You can put this solution on YOUR website!


\n" ); document.write( "(1) Note your post contains no question....

\n" ); document.write( "No matter how obvious it is what your question is, the polite thing to do in your post is ask the question.

\n" ); document.write( "(2) There is no standard use of the \"\\" symbol, so I don't know what to make of \"(2\alpha +(\pi )/(4))\"....

\n" ); document.write( "But the equation is of the form \"cos%28x%29=3tan%28x%29\", which can be solved for x:

\n" ); document.write( "\"cos%28x%29=3tan%28x%29\"
\n" ); document.write( "\"cos%28x%29=%283sin%28x%29%29%2Fcos%28x%29\"
\n" ); document.write( "\"%28cos%28x%29%29%5E2=3sin%28x%29\"
\n" ); document.write( "\"1-%28sin%28x%29%29%5E2=3sin%28x%29\"
\n" ); document.write( "\"%28sin%28x%29%29%5E2%2B3sin%28x%29-1=0\"

\n" ); document.write( "That does not factor over the integers, so use the quadratic formula.
\n" ); document.write( "\"sin%28x%29=%28-3%2Bsqrt%2813%29%29%2F2\"

\n" ); document.write( "The other root produces an invalid value for sin(x), so it can be ignored.

\n" ); document.write( "But, since I have no idea what your post means, I don't know if that is of any help to you....

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