Technical Shop Mathematics, Third Edition

The Greek letters are frequently used in mathematical expressions and formulas. The Greek alphabet is given below.
| A | ? | Alpha | H | ? | Eta | N | ? | Nu | T | ? | Tau |
| B | ? | Beta | ? | | Theta | ? | ? | Xi | | ? | Upsilon |
| ? | ? | Gamma | I | ? | Iota | O | o | Omicron | ? | | Phi |
| ? | ? | Delta | K | ? | Kappa | ? | ? | Pi | X | ? | Chi |
| E | ? | Epsilon | ? | ? | Lambda | R | ? | Rho | ? | ? | Psi |
| Z | ? | Zeta | M | ? | Mu | ? | ? ? | Sigma | ? | ? | Omega |
Decimal multiples and sub-multiples of SI units are formed by using the prefixes given in the following table, which represent the numerical factors shown.
| Factor by which the unit is multiplied | Prefix | Symbol | Factor by which the unit is multiplied | Prefix | Symbol |
|---|---|---|---|---|---|
| 10 12 | tera | T | 10 ? 2 | centi | c |
| 10 9 | giga | G | 10 ? 3 | milli | m |
| 10 6 | mega | M | 10 ? 6 | micro | ? |
| 10 3 | kilo | k | 10 ? 9 | nano | n |