Changes

::My draft of an explanation of how we ''really'' define sine, cosine, and exponential, and how we therefore ''really'' know that [[Euler's Formula]] and Euler's identity are true, without all the non-rigorous middle-school-level handwaving, will wait until I come back.

::My draft of an explanation of how we ''really'' define sine, cosine, and exponential, and how we therefore ''really'' know that [[Euler's Formula]] and Euler's identity are true, without all the non-rigorous middle-school-level handwaving, will wait until I come back.

::I recommend that, if anyone, especially a new user, edits a page on science, mathematics, or chemical elements, you simply revert it, unless you can find a subject matter expert to evaluate it properly.  I will look at things when I get back.

::I recommend that, if anyone, especially a new user, edits a page on science, mathematics, or chemical elements, you '''wait a month or so''' to see if a subject matter expert comes along, and let that subject matter expert revert it, if necessary.  I will look at things when I get back.  If you're not sure, ask someone.  Or post on the Community Portal.  Don't just destroy stuff.