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    Cos 127 Degrees

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

    What is cos 127°?

    Answer

    cos 127° ≈
    −0.6018

    Angle in radians: 127° = 127π/180. The point of the angle is in quadrant II, where cosine is negative.

    ≈ — rounded to 4 decimal places. cos 127° can't be written with square roots: 127° is not a multiple of 3°.

    cos 127° = cos(180° − 53°) = −cos 53° ≈ −0.6018

    P(cos 127°, sin 127°) ≈ (−0.6018, 0.7986)

    xyOP

    P(cos 127°, sin 127°) ≈ (−0.6018, 0.7986)

    Highlighted: the projection on the x-axis — cosine, x ≈ −0.6018.

    All four functions of 127°
    FunctionExact valueDecimal
    sin 127°—≈ 0.7986
    cos 127°—≈ −0.6018
    tan 127°—≈ −1.3270
    cot 127°—≈ −0.7536

    Reference angle: cos 53° ≈ 0.6018

    See Also

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    https://calculat.io/en/number/trigonometry/cos--127Copy
    <a href="https://calculat.io/en/number/trigonometry/cos--127">Cos 127 Degrees: Cosine of 127° on the Unit Circle</a>Copy
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    Cos 127 Degrees: Cosine of 127° on the Unit Circle. cos 127° ≈ −0.6018. The cosine is the x-coordinate of the point at 127° on the unit circle; 127° reduces to 53°.
    https://calculat.io/en/number/trigonometry/cos--127/generated.jpgCopy

    Cosine of nearby angles

    Anglecos
    120°−1/2
    125°≈ −0.5736
    126°−√(10 − 2√5)/4
    127°≈ −0.6018
    130°≈ −0.6428
    134°≈ −0.6947
    135°−√2/2
    Recalculate with different values ↑

    FAQ

    What is cos 127°?

    cos 127° ≈ −0.6018

    Why does cos 127° 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°. 127° is not, so no such exact form exists; the value is used as a decimal: cos 127° ≈ −0.6018.

    Why does a calculator show 0.2324 for cos 127?

    The calculator is in radian mode (RAD): it takes cos 127 as the cosine of 127 radians, cos 127 rad ≈ 0.2324. Switch it to degrees (DEG): cos 127° ≈ −0.6018. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.

    See Also