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2. Comma-separated values - Wikipedia

   en.wikipedia.org/wiki/Comma-separated_values

   Comma-separated values (CSV) is a text file format that uses commas to separate values, and newlines to separate records. A CSV file stores tabular data (numbers and text) in plain text, where each line of the file typically represents one data record.

3. Heron's formula - Wikipedia

   en.wikipedia.org/wiki/Heron's_formula

   Heron's formula is also a special case of the formula for the area of a trapezoid or trapezium based only on its sides. Heron's formula is obtained by setting the smaller parallel side to zero. Expressing Heron's formula with a Cayley–Menger determinant in terms of the squares of the distances between the three given vertices,

4. Fibonacci sequence - Wikipedia

   en.wikipedia.org/wiki/Fibonacci_sequence

   In mathematics, the Fibonacci sequence is a sequence in which each number is the sum of the two preceding ones. Numbers that are part of the Fibonacci sequence are known as Fibonacci numbers, commonly denoted F n .

5. Floral formula - Wikipedia

   en.wikipedia.org/wiki/Floral_formula

   A floral formula is a notation for representing the structure of particular ... The format of floral formulae differs according to the tastes of particular authors ...

6. Fix problems signing into your AOL account - AOL Help

   help.aol.com/articles/help-signing-in

   Click Sign in. If that doesn't fix the problem, try these steps and attempt to sign in after each one: Clear your browser's cookies. Quit and then restart your browser. Use a different supported web browser. Try signing into a different sign-in page, like our Aol.com sign-in page or the AOL Mail sign-in page.

7. Simple linear regression - Wikipedia

   en.wikipedia.org/wiki/Simple_linear_regression

   The formulas given in the previous section allow one to calculate the point estimates of α and β — that is, the coefficients of the regression line for the given set of data. However, those formulas do not tell us how precise the estimates are, i.e., how much the estimators α ^ {\displaystyle {\widehat {\alpha }}} and β ^ {\displaystyle ...

8. Inverse trigonometric functions - Wikipedia

   en.wikipedia.org/.../Inverse_trigonometric_functions

   The orange sheet in the middle is the principal sheet representing arctan x. The blue sheet above and green sheet below are displaced by 2 π and −2 π respectively. Since the inverse trigonometric functions are analytic functions , they can be extended from the real line to the complex plane.

9. Glossary of mathematical symbols - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_mathematical...

   1. Denotes either a plus sign or a minus sign. 2. Denotes the range of values that a measured quantity may have; for example, 10 ± 2 denotes an unknown value that lies between 8 and 12. ∓ (minus-plus sign) Used paired with ±, denotes the opposite sign; that is, + if ± is –, and – if ± is +. ÷ (division sign)