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8 votes

What is this symbol called?

Please check the entire Greek alphabet, as you can find it in this Wikipedia page: I must add that there are two ways to write the letter $phi$ in MathJax ...
Dominique's user avatar
  • 2,119
7 votes

What is this symbol called?

That's lowercase Greek phi, pronounced with an initial f sound and rhyming with English pie, lie or sky. That said, some speakers may pronounce it rhyming with English see, key or me. See https://en.m....
J W's user avatar
  • 4,733
3 votes

Why is it written $\tan^{-1}$?

Once we understand the reason $\tan^{-1}$ can mean the inverse tangent and that most people prefer to write this function as $\arctan$, your neighbor's daughter's question brings up an issue that ...
KCd's user avatar
  • 3,516
2 votes

What is this symbol called?

For such a query, you might find it quicker to use one of the following tools: Google Image Reverse Search: Navigate to and upload an image of the symbol. Google will display similar ...
LeafGlowPath's user avatar

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