Cosine Function

L2MAEL

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I’m going to plot the graphs for $y=\cos (x)$:

Plotting using table is efficient when graph is unknown.

$x$	$y=\cos x$
0	1
30	0.87
45	0.71
60	0.5
90	0
120	-0.5
135	-0.71
150	-0.87
180	-1
210	-0.87
225	-0.71
240	-0.5
270	0
300	0.5
315	0.71
330	0.87
360	1

By comparing it to the sine graph $(\sin (x))$, we can see that the two graphs are almost identical — just a few digits to the side.

Generic Equation:

$y=A\cos (B(x-p))+q$

The generic equation for the cosine function is identical to the sine function (Sine Function).

The descriptions and info for the $A$, and $B$, are defined in the Sine Function.