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For school trigonometry, it is used to find the angles of a triangle when only the lengths of the sides are known.

Later on, in mechanics, you may come across the decomposition of forces along and across the line of motion. In calculus you may come across it in second order differential equations.

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Which trigonometric functions are even?

Cosine and secant are even trig functions.


Why are sine and cosine functions used to describe periodic?

because sine & cosine functions are periodic.


How do you find the max and min of sine cosine functions?

The maximum of the sine and cosine functions is +1, and the minimum is -1.


How do you use cosine?

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The basic functions of trigonometry are: sine cosine tangent secant cosecant cotangent


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Orthogonality in Fourier series is used to simplify the representation of periodic functions as sums of sine and cosine functions. Because the sine and cosine functions are orthogonal over a defined interval, the coefficients for each term can be calculated independently. This property allows for the efficient decomposition of complex signals into simpler, non-overlapping components, making it easier to analyze and reconstruct signals in various applications, such as signal processing and communications.


What are the trigonometric functions?

sine, cosine, tangent, cosecant, secant and cotangent.


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