The Unit Circle and Book Notation Key

The Author Jonathan David

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Book notations

Note: Some symbols may have different meanings in different courses i.e., never assume.

And	$\land$
Or	$\lor$
In	$\in$
Manipulation or row reduction occurred	$\sim$
Implies	$\Rightarrow$
Becomes	$\Leftarrow$
If and only if	$\Leftrightarrow$
Therefore	$\therefore$
Because	$\because$
Equivalent/defined as	$\equiv$
Euler’s number e	$e=\sum_{n=0}^{\infty}\frac{1}{n!}=\lim_{n\to\infty}\left(1+\frac{1}{n}\right)^n$
Any other vector (scalar not bold/hat/vec)	$\vec{v}\equiv v$

Unit Circle

Below is the original page from the book.

The Author Jonathan David

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