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    Cot 66 Degrees

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

    What is cot 66°?

    Answer

    cot 66° ≈
    0.4452

    Angle in radians: 66° = 11π/30. The point of the angle is in quadrant I, where cotangent is positive.

    ≈ — rounded to 4 decimal places. An exact form of cot 66° in square roots exists, but it is unwieldy — nested radicals.

    cot 66° = cos 66° / sin 66° ≈ 0.4452

    xyOP

    P(cos 66°, sin 66°) ≈ (0.4067, 0.9135)

    C(cot 66°, 1) ≈ (0.4452, 1) — where line OP meets the line y = 1.

    All four functions of 66°
    FunctionExact valueDecimal
    sin 66°—≈ 0.9135
    cos 66°—≈ 0.4067
    tan 66°—≈ 2.2460
    cot 66°—≈ 0.4452

    See Also

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    https://calculat.io/en/number/trigonometry/cot--66Copy
    <a href="https://calculat.io/en/number/trigonometry/cot--66">Cot 66 Degrees: Cotangent of 66° on the Unit Circle</a>Copy
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    Cot 66 Degrees: Cotangent of 66° on the Unit Circle. cot 66° ≈ 0.4452. The cotangent is the ratio x/y of the point at 66° on the unit circle.
    https://calculat.io/en/number/trigonometry/cot--66/generated.jpgCopy

    Cotangent of nearby angles

    Anglecot
    63°≈ 0.5095
    64°≈ 0.4877
    65°≈ 0.4663
    66°≈ 0.4452
    67°≈ 0.4245
    68°≈ 0.4040
    69°≈ 0.3839
    Recalculate with different values ↑

    FAQ

    What is cot 66°?

    cot 66° ≈ 0.4452

    Is there an exact value of cot 66°?

    Yes: 66° is a multiple of 3°, and the values of such angles can be written with square roots — but the expression is unwieldy, with nested radicals built from the values of 18° and 15° (3° = 18° − 15°). In practice the decimal is used: cot 66° ≈ 0.4452.

    Why does a calculator show 37.6499 for cot 66?

    The calculator is in radian mode (RAD): it takes cot 66 as the cotangent of 66 radians, cot 66 rad ≈ 37.6499. Switch it to degrees (DEG): cot 66° ≈ 0.4452. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.

    See Also