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    Tan 64 Degrees

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

    What is tan 64°?

    Answer

    tan 64° ≈
    2.0503

    Angle in radians: 64° = 16π/45. The point of the angle is in quadrant I, where tangent is positive.

    ≈ — rounded to 4 decimal places. tan 64° can't be written with square roots: 64° is not a multiple of 3°.

    tan 64° = sin 64° / cos 64° ≈ 2.0503

    xyOP

    P(cos 64°, sin 64°) ≈ (0.4384, 0.8988)

    T(1, tan 64°) ≈ (1, 2.0503) — where line OP meets the line x = 1; T is beyond the drawing, the arrow points to it.

    All four functions of 64°
    FunctionExact valueDecimal
    sin 64°—≈ 0.8988
    cos 64°—≈ 0.4384
    tan 64°—≈ 2.0503
    cot 64°—≈ 0.4877

    See Also

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    https://calculat.io/en/number/trigonometry/tan--64Copy
    <a href="https://calculat.io/en/number/trigonometry/tan--64">Tan 64 Degrees: Tangent of 64° on the Unit Circle</a>Copy
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    Tan 64 Degrees: Tangent of 64° on the Unit Circle. tan 64° ≈ 2.0503. The tangent is the ratio y/x of the point at 64° on the unit circle.
    https://calculat.io/en/number/trigonometry/tan--64/generated.jpgCopy

    Tangent of nearby angles

    Angletan
    61°≈ 1.8040
    62°≈ 1.8807
    63°≈ 1.9626
    64°≈ 2.0503
    65°≈ 2.1445
    66°≈ 2.2460
    67°≈ 2.3559
    Recalculate with different values ↑

    FAQ

    What is tan 64°?

    tan 64° ≈ 2.0503

    Why does tan 64° 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°. 64° is not, so no such exact form exists; the value is used as a decimal: tan 64° ≈ 2.0503.

    Why does a calculator show 2.3479 for tan 64?

    The calculator is in radian mode (RAD): it takes tan 64 as the tangent of 64 radians, tan 64 rad ≈ 2.3479. Switch it to degrees (DEG): tan 64° ≈ 2.0503. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.

    See Also