Trigonometry Values Pi/10
 |  |  | |
|  | (1) |
So we have
 | |  | |
|  | ||
|  | (2) |
and
 | (3) |
| |  | (4) |
| |  | (5) |
 | |  | (6) |
 | |  | (7) |
 | |  | (8) |
 | |  | (9) |
An interesting near-identity is given by
 | (10) |
.See also Decagon, Decagram- Zarankiewicz's Conjecture
- Zariski Topology
- Zaslavskii Map
- Zassenhaus-Berlekamp Algorithm
- z-Axis
- z-Distribution
- Zeckendorf Representation
- Zeckendorf's Theorem
- Zeeman's Paradox
- Zeilberger's Algorithm
- Zeisel Number
- Zeno's Paradoxes
- Zermelo-Fraenkel Axioms
- Zermelo-Fraenkel Set Theory
- Zermelo's Axiom of Choice
- Zermelo Set Theory
- Zernike Polynomial
- Zero
- Zero Divisor
- Zero (Root)
- Zero-Sum Game
- Zeta Fuchsian
- Zeta Function
- Zeuthen's Rule
- Zeuthen's Theorem