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    Cot 100 Degrees

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

    What is cot 100°?

    Answer

    cot 100° ≈
    −0.1763

    Angle in radians: 100° = 5π/9. The point of the angle is in quadrant II, where cotangent is negative.

    ≈ — rounded to 4 decimal places. cot 100° can't be written with square roots: 100° is not a multiple of 3°.

    cot 100° = cot(180° − 80°) = −cot 80° ≈ −0.1763

    cot 100° = cos 100° / sin 100° ≈ −0.1763

    xyOP

    P(cos 100°, sin 100°) ≈ (−0.1736, 0.9848)

    C(cot 100°, 1) ≈ (−0.1763, 1) — where line OP meets the line y = 1.

    All four functions of 100°
    FunctionExact valueDecimal
    sin 100°—≈ 0.9848
    cos 100°—≈ −0.1736
    tan 100°—≈ −5.6713
    cot 100°—≈ −0.1763

    Reference angle: cot 80° ≈ 0.1763

    See Also

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    https://calculat.io/en/number/trigonometry/cot--100Copy
    <a href="https://calculat.io/en/number/trigonometry/cot--100">Cot 100 Degrees: Cotangent of 100° on the Unit Circle</a>Copy
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    Cot 100 Degrees: Cotangent of 100° on the Unit Circle. cot 100° ≈ −0.1763. The cotangent is the ratio x/y of the point at 100° on the unit circle; 100° reduces to 80°.
    https://calculat.io/en/number/trigonometry/cot--100/generated.jpgCopy

    Cotangent of nearby angles

    Anglecot
    90°0
    97°≈ −0.1228
    98°≈ −0.1405
    100°≈ −0.1763
    101°≈ −0.1944
    105°√3 − 2
    106°≈ −0.2867
    Recalculate with different values ↑

    FAQ

    What is cot 100°?

    cot 100° ≈ −0.1763

    Why does cot 100° have no exact value?

    A trigonometric value of a whole number of degrees can be written with square roots only when the angle is a multiple of 3°. 100° is not, so no such exact form exists; the value is used as a decimal: cot 100° ≈ −0.1763.

    Why does a calculator show −1.7030 for cot 100?

    The calculator is in radian mode (RAD): it takes cot 100 as the cotangent of 100 radians, cot 100 rad ≈ −1.7030. Switch it to degrees (DEG): cot 100° ≈ −0.1763. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.

    See Also