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    Cos 227 Degrees

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

    What is cos 227°?

    Answer

    cos 227° ≈
    −0.6820

    Angle in radians: 227° = 227π/180. The point of the angle is in quadrant III, where cosine is negative.

    ≈ — rounded to 4 decimal places. cos 227° can't be written with square roots: 227° is not a multiple of 3°.

    cos 227° = cos(180° + 47°) = −cos 47° ≈ −0.6820

    P(cos 227°, sin 227°) ≈ (−0.6820, −0.7314)

    xyOP

    P(cos 227°, sin 227°) ≈ (−0.6820, −0.7314)

    Highlighted: the projection on the x-axis — cosine, x ≈ −0.6820.

    All four functions of 227°
    FunctionExact valueDecimal
    sin 227°—≈ −0.7314
    cos 227°—≈ −0.6820
    tan 227°—≈ 1.0724
    cot 227°—≈ 0.9325

    Reference angle: cos 47° ≈ 0.6820

    See Also

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    https://calculat.io/en/number/trigonometry/cos--227Copy
    <a href="https://calculat.io/en/number/trigonometry/cos--227">Cos 227 Degrees: Cosine of 227° on the Unit Circle</a>Copy
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    Cos 227 Degrees: Cosine of 227° on the Unit Circle. cos 227° ≈ −0.6820. The cosine is the x-coordinate of the point at 227° on the unit circle; 227° reduces to 47°.
    https://calculat.io/en/number/trigonometry/cos--227/generated.jpgCopy

    Cosine of nearby angles

    Anglecos
    215°≈ −0.8192
    216°−(√5 + 1)/4
    225°−√2/2
    227°≈ −0.6820
    234°−√(10 − 2√5)/4
    240°−1/2
    252°−(√5 − 1)/4
    Recalculate with different values ↑

    FAQ

    What is cos 227°?

    cos 227° ≈ −0.6820

    Why does cos 227° 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°. 227° is not, so no such exact form exists; the value is used as a decimal: cos 227° ≈ −0.6820.

    Why does a calculator show 0.6929 for cos 227?

    The calculator is in radian mode (RAD): it takes cos 227 as the cosine of 227 radians, cos 227 rad ≈ 0.6929. Switch it to degrees (DEG): cos 227° ≈ −0.6820. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.

    See Also