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    Sin 88 Degrees

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

    What is sin 88°?

    Answer

    sin 88° ≈
    0.9994

    Angle in radians: 88° = 22π/45. The point of the angle is in quadrant I, where sine is positive.

    ≈ — rounded to 4 decimal places. sin 88° can't be written with square roots: 88° is not a multiple of 3°.

    P(cos 88°, sin 88°) ≈ (0.0349, 0.9994)

    xyOP

    P(cos 88°, sin 88°) ≈ (0.0349, 0.9994)

    Highlighted: the projection on the y-axis — sine, y ≈ 0.9994.

    All four functions of 88°
    FunctionExact valueDecimal
    sin 88°—≈ 0.9994
    cos 88°—≈ 0.0349
    tan 88°—≈ 28.6363
    cot 88°—≈ 0.0349

    See Also

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    <a href="https://calculat.io/en/number/trigonometry/sin--88">Sin 88 Degrees: Sine of 88° on the Unit Circle - Calculatio</a>Copy
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    Sin 88 Degrees: Sine of 88° on the Unit Circle. sin 88° ≈ 0.9994. The sine is the y-coordinate of the point at 88° on the unit circle.
    https://calculat.io/en/number/trigonometry/sin--88/generated.jpgCopy

    Sine of nearby angles

    Anglesin
    85°≈ 0.9962
    86°≈ 0.9976
    87°≈ 0.9986
    88°≈ 0.9994
    89°≈ 0.9998
    90°1
    97°≈ 0.9925
    Recalculate with different values ↑

    FAQ

    What is sin 88°?

    sin 88° ≈ 0.9994

    Why does sin 88° 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°. 88° is not, so no such exact form exists; the value is used as a decimal: sin 88° ≈ 0.9994.

    Why does a calculator show 0.0354 for sin 88?

    The calculator is in radian mode (RAD): it takes sin 88 as the sine of 88 radians, sin 88 rad ≈ 0.0354. Switch it to degrees (DEG): sin 88° ≈ 0.9994. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.

    See Also