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    Cos 61 Degrees

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

    What is cos 61°?

    Answer

    cos 61° ≈
    0.4848

    Angle in radians: 61° = 61π/180. The point of the angle is in quadrant I, where cosine is positive.

    ≈ — rounded to 4 decimal places. cos 61° can't be written with square roots: 61° is not a multiple of 3°.

    P(cos 61°, sin 61°) ≈ (0.4848, 0.8746)

    xyOP

    P(cos 61°, sin 61°) ≈ (0.4848, 0.8746)

    Highlighted: the projection on the x-axis — cosine, x ≈ 0.4848.

    All four functions of 61°
    FunctionExact valueDecimal
    sin 61°—≈ 0.8746
    cos 61°—≈ 0.4848
    tan 61°—≈ 1.8040
    cot 61°—≈ 0.5543

    See Also

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    https://calculat.io/en/number/trigonometry/cos--61Copy
    <a href="https://calculat.io/en/number/trigonometry/cos--61">Cos 61 Degrees: Cosine of 61° on the Unit Circle</a>Copy
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    Cos 61 Degrees: Cosine of 61° on the Unit Circle. cos 61° ≈ 0.4848. The cosine is the x-coordinate of the point at 61° on the unit circle.
    https://calculat.io/en/number/trigonometry/cos--61/generated.jpgCopy

    Cosine of nearby angles

    Anglecos
    58°≈ 0.5299
    59°≈ 0.5150
    60°1/2
    61°≈ 0.4848
    62°≈ 0.4695
    63°≈ 0.4540
    64°≈ 0.4384
    Recalculate with different values ↑

    FAQ

    What is cos 61°?

    cos 61° ≈ 0.4848

    Why does cos 61° 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°. 61° is not, so no such exact form exists; the value is used as a decimal: cos 61° ≈ 0.4848.

    Why does a calculator show −0.2581 for cos 61?

    The calculator is in radian mode (RAD): it takes cos 61 as the cosine of 61 radians, cos 61 rad ≈ −0.2581. Switch it to degrees (DEG): cos 61° ≈ 0.4848. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.

    See Also