Cotangent
| Type: | Cotangent |
| Style: | Cotangent, arc |
| Geometry: | Circular, concentric |
| Unit of measurement: | 1/60 of quadrant radius |
| (Numbering) starts at: | 0 |
| (Numbering) ends at: | 40 |
| Numbered: | Every 5 |
| Repeats: | 1 times |
| Divided every: | 5 (1/60 of quadrant radius) |
| then every: | 1 (1/60 of quadrant radius) |
Scale located on: Tympan, Womb or Back .
Location(s) detail:
| 3: | Lower left quadrant of outer circular on back of instrument. (3) |
Inscription(s):
| Type: | Scale label |
| Content: | ظل اقدام |
| Translation: | Shadow [scale] of feet |
| Language: | Persian |
| Script: | Nashki |
| Notes: | |
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