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    Cot 270 Degrees

    Sin, Cos, Tan, Cot of an Angle
    Function
    Angle (°)

    What is cot 270°?

    Answer

    cot 270° =
    0

    Angle in radians: 270° = 3π/2. The point of the angle is on the y-axis: (0, −1).

    cot 270° = cos 270° / sin 270° = 0 / (−1) = 0

    xyOP

    P(cos 270°, sin 270°) = (0, −1)

    C(cot 270°, 1) = (0, 1) — where line OP meets the line y = 1, on the extension of the ray beyond O (dashed).

    All four functions of 270°
    FunctionExact valueDecimal
    sin 270°−1−1
    cos 270°00
    tan 270°undefined—
    cot 270°00

    Reference angle: cot 90° = 0

    See Also

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    https://calculat.io/en/number/trigonometry/cot--270Copy
    <a href="https://calculat.io/en/number/trigonometry/cot--270">Cot 270 Degrees: Cotangent of 270° on the Unit Circle</a>Copy
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    Cot 270 Degrees: Cotangent of 270° on the Unit Circle. cot 270° = 0. The cotangent is the ratio x/y of the point at 270° on the unit circle.
    https://calculat.io/en/number/trigonometry/cot--270/generated.jpgCopy

    Cotangent of nearby angles

    Anglecot
    240°√3/3
    252°√(25 − 10√5)/5
    255°2 − √3
    270°0
    285°√3 − 2
    288°−√(25 − 10√5)/5
    300°−√3/3
    Recalculate with different values ↑

    FAQ

    What is cot 270°?

    cot 270° = 0

    Why is cot 270° equal to 0?

    The point of 270° on the unit circle is (0, −1), and cot = x / y = 0 / (−1) = 0.

    Why does a calculator show −5.5916 for cot 270?

    The calculator is in radian mode (RAD): it takes cot 270 as the cotangent of 270 radians, cot 270 rad ≈ −5.5916. Switch it to degrees (DEG): cot 270° = 0. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.

    See Also