document.write( "Question 475313: Sir,
\n" ); document.write( "my question is how to dissolve imaginary part in an equation completely.
\n" ); document.write( "the equation is of the form cos(theeta)+jsin(theeta) & j,the imaginary part should be completely taken out by simplifying & iam not finding the solution.Pls help me \n" ); document.write( "

Algebra.Com's Answer #325951 by robertb(5830) $\"\"$ $\"About$

You can put this solution on YOUR website!
Not exactly sure how your equation looks like, but if it is of the form\r
\n" ); document.write( "\n" ); document.write( " $\"cos%28theta%29+%2B+j%2Asin%28theta%29+=+f%28theta%29\"$ ,\r
\n" ); document.write( "\n" ); document.write( "where $\"f%28theta%29\"$ is some expression in terms of $\"theta\"$ , then you can use de Moivre's formula to \"suppress\" j by raising both sides to some integer power n. The only caveat to this is, you have to make sure that \r
\n" ); document.write( "\n" ); document.write( " $\"n%2Atheta+=+2k%2Api\"$ , for some integer k.\r
\n" ); document.write( "\n" ); document.write( "If $\"theta\"$ cannot be written in this form then you cannot use de Moivre's theorem to \"dissolve\" j. \n" ); document.write( "

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