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Multiply. √3/2cis(2π/9)·√6/4cis(3π/2). Which is the answer?

 

  • 2√3/8cis(31π/18)
  • 3√2/8cis(π/3)
  • 3√2/8cis(31π/18)
  • 2√3/8cis(π/3)
 May 19, 2020
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To multiply  r1·cis( theta1 )  x  r2·cis( theta2)  =  r1·r2·cis( theta1 + theta2 )

[multiply the r-values and add the angles]

 

  √3/2cis(2π/9)·√6/4cis(3π/2)  =  ( 3/2 )·( √6/4 ) cis( 2π/9 + 3π/2 )

                                               =  ......

 May 19, 2020

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