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    Cos 71 Degrees

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

    What is cos 71°?

    Answer

    cos 71° ≈
    0.3256

    Angle in radians: 71° = 71π/180. The point of the angle is in quadrant I, where cosine is positive.

    ≈ — rounded to 4 decimal places. cos 71° can't be written with square roots: 71° is not a multiple of 3°.

    P(cos 71°, sin 71°) ≈ (0.3256, 0.9455)

    xyOP

    P(cos 71°, sin 71°) ≈ (0.3256, 0.9455)

    Highlighted: the projection on the x-axis — cosine, x ≈ 0.3256.

    All four functions of 71°
    FunctionExact valueDecimal
    sin 71°—≈ 0.9455
    cos 71°—≈ 0.3256
    tan 71°—≈ 2.9042
    cot 71°—≈ 0.3443

    See Also

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    https://calculat.io/en/number/trigonometry/cos--71Copy
    <a href="https://calculat.io/en/number/trigonometry/cos--71">Cos 71 Degrees: Cosine of 71° on the Unit Circle</a>Copy
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    Cos 71 Degrees: Cosine of 71° on the Unit Circle. cos 71° ≈ 0.3256. The cosine is the x-coordinate of the point at 71° on the unit circle.
    https://calculat.io/en/number/trigonometry/cos--71/generated.jpgCopy

    Cosine of nearby angles

    Anglecos
    68°≈ 0.3746
    69°≈ 0.3584
    70°≈ 0.3420
    71°≈ 0.3256
    72°(√5 − 1)/4
    73°≈ 0.2924
    74°≈ 0.2756
    Recalculate with different values ↑

    FAQ

    What is cos 71°?

    cos 71° ≈ 0.3256

    Why does cos 71° 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°. 71° is not, so no such exact form exists; the value is used as a decimal: cos 71° ≈ 0.3256.

    Why does a calculator show −0.3090 for cos 71?

    The calculator is in radian mode (RAD): it takes cos 71 as the cosine of 71 radians, cos 71 rad ≈ −0.3090. Switch it to degrees (DEG): cos 71° ≈ 0.3256. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.

    See Also