# acos

Return the arc cosine of x, in radians.

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{"acos":1.05}

# asin

Return the arc sine of x, in radians.

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{"asin":0.52}

# atan

Return the arc tangent of x, in radians.

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{"atan":0.46}

# atan2

Return atan(y / x), in radians. The result is between -pi and pi. The vector in the plane from the origin to point (x, y) makes this angle with the positive X axis. The point of atan2() is that the signs of both inputs are known to it, so it can compute the correct quadrant for the angle. For example, atan(1) and atan2(1, 1) are both pi/4, but atan2(-1, -1) is -3*pi/4.

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#### Example Response

{"atan2":1.1071487177940904}

# cos

Return the cosine of x radians.

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#### Example Response

{"cos":-0.9899924966004454}

# hypot

Return the Euclidean norm, sqrt(x*x + y*y). This is the length of the vector from the origin to point (x, y).

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{"hypot":1.41}

# sin

Return the sine of x radians.

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#### Example Response

{"sin":0.1411200080598672}

# tan

Return the tangent of x radians.

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#### Example Response

{"tan":-1.995200412208242}