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    Tan 88 Degrees

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

    What is tan 88°?

    Answer

    tan 88° ≈
    28.6363

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

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

    tan 88° = sin 88° / cos 88° ≈ 28.6363

    xyOP

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

    T(1, tan 88°) ≈ (1, 28.6363) — where line OP meets the line x = 1; T is beyond the drawing, the arrow points to it.

    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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    https://calculat.io/en/number/trigonometry/tan--88Copy
    <a href="https://calculat.io/en/number/trigonometry/tan--88">Tan 88 Degrees: Tangent of 88° on the Unit Circle</a>Copy
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    Tan 88 Degrees: Tangent of 88° on the Unit Circle. tan 88° ≈ 28.6363. The tangent is the ratio y/x of the point at 88° on the unit circle.
    https://calculat.io/en/number/trigonometry/tan--88/generated.jpgCopy

    Tangent of nearby angles

    Angletan
    85°≈ 11.4301
    86°≈ 14.3007
    87°≈ 19.0811
    88°≈ 28.6363
    89°≈ 57.2900
    90°undefined
    97°≈ −8.1443
    Recalculate with different values ↑

    FAQ

    What is tan 88°?

    tan 88° ≈ 28.6363

    Why does tan 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: tan 88° ≈ 28.6363.

    Why does a calculator show 0.0354 for tan 88?

    The calculator is in radian mode (RAD): it takes tan 88 as the tangent of 88 radians, tan 88 rad ≈ 0.0354. Switch it to degrees (DEG): tan 88° ≈ 28.6363. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.

    See Also