Difference between revisions of "Cis"
(Since several complex numbers don't have a magnitude of 1, z=r*cis(theta)) |
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| − | '''Cis''' notation is a [[polar form | polar]] notation for [[complex number]]s. For all complex numbers <math>z</math>, we can write <math>z=\mathrm{cis }(\theta)=\cos \theta + | + | '''Cis''' notation is a [[polar form | polar]] notation for [[complex number]]s. For all complex numbers <math>z</math>, we can write <math>z=r\mathrm{cis }(\theta)=r\cos \theta + ir\sin \theta</math>. Notice that <math>\mathrm{cis}</math> is made up by the first letter of <math>\cos</math>, <math>i</math>, and the first letter of <math>\sin</math>. |
== See also == | == See also == | ||
Revision as of 18:13, 7 July 2006
Cis notation is a polar notation for complex numbers. For all complex numbers 
, we can write 
. Notice that 
is made up by the first letter of 
, 
, and the first letter of 
.
