document.write( "Question 1197765: Write the complex number of square root of 3 + i \n" ); document.write( "
Algebra.Com's Answer #831186 by math_helper(2461)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "\"+a+%2B+b%2Ai+\" can be written \"+m+\"\"theta+\" (\"m angle theta\"),
\n" ); document.write( " where:\r
\n" ); document.write( "\n" ); document.write( " m = \"+sqrt%28a%5E2+%2B+b%5E2%29+\"\r
\n" ); document.write( "\n" ); document.write( "and
\n" ); document.write( " \"+theta\" = \"+tan%5E-1+%28+b%2F+a%29+\"\r
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\n" ); document.write( "\n" ); document.write( "For 3+i: m = \"+sqrt%283%5E2+%2B+1%5E2%29+\" = \"+sqrt%2810%29+\"
\n" ); document.write( " \"theta\" = \"tan%5E-1%281%2F3%29+\" or approx. 18.435 degrees.\r
\n" ); document.write( "\n" ); document.write( "Now, to find the square root, just take the square root of m and divide the angle \"+theta\" by two:
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\n" ); document.write( " sqrt(3+i) = \"+root%284%2C10%29+\"\"+%281%2F2%29%2A+18.435%5Eo+\" \r
\n" ); document.write( "\n" ); document.write( "or approx. = \"+1.778+\"\"+9.218%5Eo+\"\r
\n" ); document.write( "\n" ); document.write( "If you must express this as 'a + bi' form (rectangular form):
\n" ); document.write( " a = m * cos(\"theta\") = 1.778*cos(9.218) = 1.755
\n" ); document.write( " b = m * sin(\"theta\") = 1.778*sin(9.218) = 0.285\r
\n" ); document.write( "\n" ); document.write( "so \"+sqrt%283%2Bi%29+\"\"+highlight%281.755+%2B+0.285i%29+\"\r
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\n" ); document.write( "EDIT: the notation I used really comes from Electrical Engineering, but keep in mind it is just shorthand for a+bi = \"m%2Ae%5E%28i%2Atheta%29+\"
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