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    Arccos of 60

    Arcsin, Arccos, Arctan, Arccot
    Function
    x

    What is arccos(60)?

    Answer

    arccos 60
    does not exist

    Range: arccos x is an angle from 0° to 180°, so the answer is unique.

    The cosine of any angle lies between −1 and 1, and 60 is outside — no angle has such a cosine.

    If 60 is an angle in degrees, you need the direct function: cos 60° = 1/2.

    An angle α with cos α = 60 would have to lie on the line x = 60, but that line passes to the right of the circle.

    xyO

    The line x = 60 passes to the right of the circle, beyond the drawing: they have no common point, so no angle α has cos α = 60.

    All four inverse functions of 60
    FunctionDegreesRadians
    arcsin(60)does not exist—
    arccos(60)does not exist—
    arctan(60)≈ 89.0452°≈ 1.5541
    arccot(60)≈ 0.9548°≈ 0.0167

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    <a href="https://calculat.io/en/number/inverse-trigonometry/arccos--60">Arccos of 60 (Inverse Cosine) in Degrees and Radians</a>Copy
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    Arccos of 60 (Inverse Cosine) in Degrees and Radians. arccos 60 does not exist: the cosine of any angle lies between −1 and 1, and 60 is outside. What you may have meant — below.
    https://calculat.io/en/number/inverse-trigonometry/arccos--60/generated.jpgCopy

    FAQ

    What is arccos(60)?

    arccos 60 does not exist

    Why does arccos 60 not exist?

    The cosine is the x-coordinate of a point on the unit circle, so the cosine of any angle lies between −1 and 1. 60 is outside: the line x = 60 does not meet the circle, and no angle has a cosine of 60. If 60 is an angle in degrees, you need the direct function: cos 60° = 1/2.

    What is the difference between arccos, cos⁻¹ and 1/cos?

    cos⁻¹ x is another way to write arccos x (that is how the calculator key is labelled), not 1/cos x: 1/cos x is the secant. arccos x is the angle whose cosine is x; it exists only for −1 ≤ x ≤ 1. Here: arccos 60 does not exist.