Cotangent Values

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Cotangent values

By Ashok Kumar, B.E.

Fact-checked: February 16, 2026

The trigonometric function cotangent gives a value for every angle of a right triangle and each value is called the cotangent value. In trigonometry, there are many cot values but five cot values are used mostly and they are used to derive the remaining cot function values mathematically.

Table

The special values of cotangent function for some standard angles are given here in a tabular form with proofs. The cot chart is really helpful to us in mathematics and everyone who studies trigonometry should remember them.

Angle $(\theta)$ Cot value $(\cot{\theta})$
Degrees Radian Grades Fraction Decimal Proof
$0^°$ $0$ $0^g$ $\infty$ $\infty$ Learn more
$30^°$ $\dfrac{\pi}{6}$ $33\dfrac{1}{3}^g$ $\sqrt{3}$ $1.7321$ Learn more
$45^°$ $\dfrac{\pi}{4}$ $50^g$ $1$ $1$ Learn more
$60^°$ $\dfrac{\pi}{3}$ $66\dfrac{2}{3}^g$ $\dfrac{1}{\sqrt{3}}$ $0.5774$ Learn more
$90^°$ $\dfrac{\pi}{2}$ $100^g$ $0$ $0$ Learn more
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Ashok Kumar, B.E.

Founder of Math Doubts

A Specialist in Mathematics, Physics, and Engineering with 14 years of experience helping students master complex concepts from basics to advanced levels with clarity and precision.

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