TRG008 · Trigonometry · Classes 10–11
Cotangent
Cotangent is the reciprocal of tangent: cot θ = cos θ / sin θ = adjacent / opposite.
cot θCotangent
📐 Formula
cot θ = 1 / tan θ
✏️ Worked example
cot 45° = 1.
🌍 Where it is used
Some navigation and engineering formulas.
❓ Quick check
cot 90° = ?
🏋️ Practice
Easytan θ = 4. cot θ?
Answer: ¼
Mediumcot 30° = ?
Answer: √3
ChallengeWhere is cot undefined?
Answer: Where sin θ = 0