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    Sin 38 Degrees

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

    What is sin 38°?

    Answer

    sin 38° ≈
    0.6157

    Angle in radians: 38° = 19π/90. The point of the angle is in quadrant I, where sine is positive.

    ≈ — rounded to 4 decimal places. sin 38° can't be written with square roots: 38° is not a multiple of 3°.

    P(cos 38°, sin 38°) ≈ (0.7880, 0.6157)

    xyOP

    P(cos 38°, sin 38°) ≈ (0.7880, 0.6157)

    Highlighted: the projection on the y-axis — sine, y ≈ 0.6157.

    All four functions of 38°
    FunctionExact valueDecimal
    sin 38°—≈ 0.6157
    cos 38°—≈ 0.7880
    tan 38°—≈ 0.7813
    cot 38°—≈ 1.2799

    See Also

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    https://calculat.io/en/number/trigonometry/sin--38Copy
    <a href="https://calculat.io/en/number/trigonometry/sin--38">Sin 38 Degrees: Sine of 38° on the Unit Circle - Calculatio</a>Copy
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    Sin 38 Degrees: Sine of 38° on the Unit Circle. sin 38° ≈ 0.6157. The sine is the y-coordinate of the point at 38° on the unit circle.
    https://calculat.io/en/number/trigonometry/sin--38/generated.jpgCopy

    Sine of nearby angles

    Anglesin
    35°≈ 0.5736
    36°√(10 − 2√5)/4
    37°≈ 0.6018
    38°≈ 0.6157
    39°≈ 0.6293
    40°≈ 0.6428
    41°≈ 0.6561
    Recalculate with different values ↑

    FAQ

    What is sin 38°?

    sin 38° ≈ 0.6157

    Why does sin 38° 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°. 38° is not, so no such exact form exists; the value is used as a decimal: sin 38° ≈ 0.6157.

    Why does a calculator show 0.2964 for sin 38?

    The calculator is in radian mode (RAD): it takes sin 38 as the sine of 38 radians, sin 38 rad ≈ 0.2964. Switch it to degrees (DEG): sin 38° ≈ 0.6157. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.

    See Also