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    Cos 73 Degrees

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

    What is cos 73°?

    Answer

    cos 73° ≈
    0.2924

    Angle in radians: 73° = 73π/180. The point of the angle is in quadrant I, where cosine is positive.

    ≈ — rounded to 4 decimal places. cos 73° can't be written with square roots: 73° is not a multiple of 3°.

    P(cos 73°, sin 73°) ≈ (0.2924, 0.9563)

    xyOP

    P(cos 73°, sin 73°) ≈ (0.2924, 0.9563)

    Highlighted: the projection on the x-axis — cosine, x ≈ 0.2924.

    All four functions of 73°
    FunctionExact valueDecimal
    sin 73°—≈ 0.9563
    cos 73°—≈ 0.2924
    tan 73°—≈ 3.2709
    cot 73°—≈ 0.3057

    See Also

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    https://calculat.io/en/number/trigonometry/cos--73Copy
    <a href="https://calculat.io/en/number/trigonometry/cos--73">Cos 73 Degrees: Cosine of 73° on the Unit Circle</a>Copy
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    Cos 73 Degrees: Cosine of 73° on the Unit Circle. cos 73° ≈ 0.2924. The cosine is the x-coordinate of the point at 73° on the unit circle.
    https://calculat.io/en/number/trigonometry/cos--73/generated.jpgCopy

    Cosine of nearby angles

    Anglecos
    70°≈ 0.3420
    71°≈ 0.3256
    72°(√5 − 1)/4
    73°≈ 0.2924
    74°≈ 0.2756
    75°(√6 − √2)/4
    76°≈ 0.2419
    Recalculate with different values ↑

    FAQ

    What is cos 73°?

    cos 73° ≈ 0.2924

    Why does cos 73° 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°. 73° is not, so no such exact form exists; the value is used as a decimal: cos 73° ≈ 0.2924.

    Why does a calculator show −0.7362 for cos 73?

    The calculator is in radian mode (RAD): it takes cos 73 as the cosine of 73 radians, cos 73 rad ≈ −0.7362. Switch it to degrees (DEG): cos 73° ≈ 0.2924. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.

    See Also