Kosekans

Kosekans — hipotenuzun qarşı katetə olan nisbətinə deyilir. İfadəsi: ${\displaystyle \csc ~x={\frac {1}{\sin ~x}}={\frac {|DO|}{|DC|}}}$

• ${\displaystyle \csc ~\theta =\sec \left({\frac {\pi }{2}}-\theta \right)}$
• ${\displaystyle \csc \theta ={\sqrt {1+(\cot \theta )^{2}}}}$

• Tangent to a circle With interactive animation
• Tangent and first derivative - An interactive simulation
• The Tangent Parabola by John H. Mathews