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    Cos 11 Degrees

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

    What is cos 11°?

    Answer

    cos 11° ≈
    0.9816

    Angle in radians: 11° = 11π/180. The point of the angle is in quadrant I, where cosine is positive.

    ≈ — rounded to 4 decimal places. cos 11° can't be written with square roots: 11° is not a multiple of 3°.

    P(cos 11°, sin 11°) ≈ (0.9816, 0.1908)

    xyOP

    P(cos 11°, sin 11°) ≈ (0.9816, 0.1908)

    Highlighted: the projection on the x-axis — cosine, x ≈ 0.9816.

    All four functions of 11°
    FunctionExact valueDecimal
    sin 11°—≈ 0.1908
    cos 11°—≈ 0.9816
    tan 11°—≈ 0.1944
    cot 11°—≈ 5.1446

    See Also

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    https://calculat.io/en/number/trigonometry/cos--11Copy
    <a href="https://calculat.io/en/number/trigonometry/cos--11">Cos 11 Degrees: Cosine of 11° on the Unit Circle</a>Copy
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    Cos 11 Degrees: Cosine of 11° on the Unit Circle. cos 11° ≈ 0.9816. The cosine is the x-coordinate of the point at 11° on the unit circle.
    https://calculat.io/en/number/trigonometry/cos--11/generated.jpgCopy

    Cosine of nearby angles

    Anglecos
    8°≈ 0.9903
    9°≈ 0.9877
    10°≈ 0.9848
    11°≈ 0.9816
    12°≈ 0.9781
    13°≈ 0.9744
    14°≈ 0.9703
    Recalculate with different values ↑

    FAQ

    What is cos 11°?

    cos 11° ≈ 0.9816

    Why does cos 11° 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°. 11° is not, so no such exact form exists; the value is used as a decimal: cos 11° ≈ 0.9816.

    Why does a calculator show 0.0044 for cos 11?

    The calculator is in radian mode (RAD): it takes cos 11 as the cosine of 11 radians, cos 11 rad ≈ 0.0044. Switch it to degrees (DEG): cos 11° ≈ 0.9816. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.

    See Also