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    Sin 79 Degrees

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

    What is sin 79°?

    Answer

    sin 79° ≈
    0.9816

    Angle in radians: 79° = 79π/180. The point of the angle is in quadrant I, where sine is positive.

    ≈ — rounded to 4 decimal places. sin 79° can't be written with square roots: 79° is not a multiple of 3°.

    P(cos 79°, sin 79°) ≈ (0.1908, 0.9816)

    xyOP

    P(cos 79°, sin 79°) ≈ (0.1908, 0.9816)

    Highlighted: the projection on the y-axis — sine, y ≈ 0.9816.

    All four functions of 79°
    FunctionExact valueDecimal
    sin 79°—≈ 0.9816
    cos 79°—≈ 0.1908
    tan 79°—≈ 5.1446
    cot 79°—≈ 0.1944

    See Also

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    https://calculat.io/en/number/trigonometry/sin--79Copy
    <a href="https://calculat.io/en/number/trigonometry/sin--79">Sin 79 Degrees: Sine of 79° on the Unit Circle - Calculatio</a>Copy
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    Sin 79 Degrees: Sine of 79° on the Unit Circle. sin 79° ≈ 0.9816. The sine is the y-coordinate of the point at 79° on the unit circle.
    https://calculat.io/en/number/trigonometry/sin--79/generated.jpgCopy

    Sine of nearby angles

    Anglesin
    76°≈ 0.9703
    77°≈ 0.9744
    78°≈ 0.9781
    79°≈ 0.9816
    80°≈ 0.9848
    81°≈ 0.9877
    82°≈ 0.9903
    Recalculate with different values ↑

    FAQ

    What is sin 79°?

    sin 79° ≈ 0.9816

    Why does sin 79° 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°. 79° is not, so no such exact form exists; the value is used as a decimal: sin 79° ≈ 0.9816.

    Why does a calculator show −0.4441 for sin 79?

    The calculator is in radian mode (RAD): it takes sin 79 as the sine of 79 radians, sin 79 rad ≈ −0.4441. Switch it to degrees (DEG): sin 79° ≈ 0.9816. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.

    See Also