The Law of Cosines

The cosine (in blue) is the x -coordinate. It can be interpreted as a phase space trajectory of the system of differential equations and starting from the initial conditions and . Series definitions [
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Sine, Cosine, Tangent

The general equation of the cosine function is given here as {eq}y=Acos(B(x-D))+C {/eq} Amplitude: The height of the waves of an oscillating function, such as the cosine function.