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    Cos 85 Degrees

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

    What is cos 85°?

    Answer

    cos 85° ≈
    0.0872

    Angle in radians: 85° = 17π/36. The point of the angle is in quadrant I, where cosine is positive.

    ≈ — rounded to 4 decimal places. cos 85° can't be written with square roots: 85° is not a multiple of 3°.

    P(cos 85°, sin 85°) ≈ (0.0872, 0.9962)

    xyOP

    P(cos 85°, sin 85°) ≈ (0.0872, 0.9962)

    Highlighted: the projection on the x-axis — cosine, x ≈ 0.0872.

    All four functions of 85°
    FunctionExact valueDecimal
    sin 85°—≈ 0.9962
    cos 85°—≈ 0.0872
    tan 85°—≈ 11.4301
    cot 85°—≈ 0.0875

    See Also

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    https://calculat.io/en/number/trigonometry/cos--85Copy
    <a href="https://calculat.io/en/number/trigonometry/cos--85">Cos 85 Degrees: Cosine of 85° on the Unit Circle</a>Copy
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    Cos 85 Degrees: Cosine of 85° on the Unit Circle. cos 85° ≈ 0.0872. The cosine is the x-coordinate of the point at 85° on the unit circle.
    https://calculat.io/en/number/trigonometry/cos--85/generated.jpgCopy

    Cosine of nearby angles

    Anglecos
    82°≈ 0.1392
    83°≈ 0.1219
    84°≈ 0.1045
    85°≈ 0.0872
    86°≈ 0.0698
    87°≈ 0.0523
    88°≈ 0.0349
    Recalculate with different values ↑

    FAQ

    What is cos 85°?

    cos 85° ≈ 0.0872

    Why does cos 85° 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°. 85° is not, so no such exact form exists; the value is used as a decimal: cos 85° ≈ 0.0872.

    Why does a calculator show −0.9844 for cos 85?

    The calculator is in radian mode (RAD): it takes cos 85 as the cosine of 85 radians, cos 85 rad ≈ −0.9844. Switch it to degrees (DEG): cos 85° ≈ 0.0872. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.

    See Also