document.write( "Question 395837: Hello, I a having a hard time with this complex numbers problem. Any help is greatly appreciated!\r
\n" ); document.write( "\n" ); document.write( "The point (-4+bi)has been plotted on the complex plane ad r=8. If 0°≤θ≤180° find the value of b. Leave your answer as a radical. \r
\n" ); document.write( "\n" ); document.write( "θ= Theta \n" ); document.write( "

Algebra.Com's Answer #280920 by jim_thompson5910(35256) $\"\"$ $\"About$

You can put this solution on YOUR website!
Hint: Recall that the number $\"a%2Bbi\"$ has the modulus $\"r=sqrt%28a%5E2%2Bb%5E2%29\"$ . In your case, $\"a=-4\"$ and $\"r=8\"$ . So $\"8=sqrt%28%28-4%29%5E2%2Bb%5E2%29\"$ \n" ); document.write( "

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