arccos() function is the trigonometric inverse cosine function so that, if y = cos(x), then x = arccos(y). If you apply it to a NumPy array, it performs the function element-wise.
numpy.arccos(x, out=None, where=True, <optional keyword arguments>)
|x||array_like||x-coordinate on the unit circle. For real arguments, the domain is |
|out||ndarray, ||(Optional.) A location into which the result is stored. If provided, it must have a shape that the inputs broadcast to. If not provided or None, a freshly-allocated array is returned. A tuple (possible only as a keyword argument) must have length equal to the number of outputs.|
|where||array_like||(Optional.) This condition is broadcast over the input. At locations where the condition is |
|**kwargs||For other keyword-only arguments, see the ufunc docs.|
The following table shows the return value of the function:
|angle||ndarray||The angle of the ray intersecting the unit circle at the given x-coordinate in radians |
arccos is a multivalued function: for each x there are infinitely many numbers z such that cos(z) = x. The convention is to return the angle z whose real part lies in [0, pi].
For real-valued input data types,
arccos always returns real output. For each value that cannot be expressed as a real number or infinity, it yields
nan and sets the invalid floating point error flag.
For complex-valued input,
arccos is a complex analytic function that has branch cuts [-inf, -1] and [1, inf] and is continuous from above on the former and from below on the latter.
cos is also known as acos or cos^-1.
Let’s dive into some examples to show how the function is used in practice:
Any master coder has a “hands-on” mentality with a bias towards action. Try it yourself—play with the function in the following interactive code shell:
Exercise: Modify the linspace() function so that you plot the arccos from -100 to +100!
Master NumPy—and become a data science pro:
Emily Rosemary Collins is a tech enthusiast with a strong background in computer science, always staying up-to-date with the latest trends and innovations. Apart from her love for technology, Emily enjoys exploring the great outdoors, participating in local community events, and dedicating her free time to painting and photography. Her interests and passion for personal growth make her an engaging conversationalist and a reliable source of knowledge in the ever-evolving world of technology.