cos(-x)
To find the value of cos(-x), we can use the cosine function’s property that it is an even function
To find the value of cos(-x), we can use the cosine function’s property that it is an even function. An even function is symmetric about the y-axis, which means its values remain the same when the input is negated.
In this case, since the input is -x instead of x, we can simply say that cos(-x) is equivalent to cos(x). Therefore, the value of cos(-x) is the same as the value of cos(x) for any given angle x.
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