de Moivres formula is currently grossly incorrect   My corrections were perfectly valid whereas the previous and now current version of the page are wrong in their majority For proof that de Moivres theorem is true for all  at the very least though no actual proof is given please see pg  of book with ISBN number  Unfortuitously I am unaware of any books that provide a proof beyond an integer power but I have already provided a proof and if you find that insufficient I can provide you with other internet sources that cite it I can understand and forgive a nonmathematical page containing errors as nonmathematical phenomena are not clear cut nor are they ever entirely obvious and often it is plausible to find support for all sets of contradicting information However this is not the case with mathematics which is the only subject that can have all of its information conclusively proved or disproved As such maths should never be quoted incorrectly in any Wikipedia article as it is extremely black and white ie things are either purely correct or incorrect and as it stands my corrections were correct whereas the current page reversion is not I am amazed at how this page is able to pertain information of such mass gross inaccuracy especially given the simplicity of de Moivres theorem and the prerequisites needed to understand it It is after all something that all students of complex numbers by extension of studying further mathematics learn at the age of  in England UK Though I appreciate that even a graduate of a masters in mathematics may be misinformed on this subject given that they have never studied complex numbers but as such they should not consider themselves versed enough to be able to misinform others by way or publishing erroneous statements in this article