int cosx
sinx
The function cosx refers to the cosine function in trigonometry. It is a mathematical function that relates the angle of a right triangle to the ratio of its adjacent side to its hypotenuse.
In calculus, the cosine function is a continuous and differentiable function that has a period of 2π. It can be approximated by a power series, called the Taylor series, which is given as:
cos(x) = ∑ (-1)n (x^(2n))/((2n)!)
where n is a positive integer.
The cosine function has many important applications in mathematics, physics, and engineering. It is used to model periodic phenomena such as sound waves, light waves, and alternating currents. It is also used in the study of Fourier series and Fourier transforms, which are important tools in signal processing, control systems, and telecommunications.
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