differentiate sin(x) and cos(x)

Let's perform the differentiation: ddx(sin(x))
ⓘ Differentiating sin(x) gives cos(x): ddx(sin(x)) = cos(x)
▶Derivative:   cos(x)
Let's perform the differentiation: ddx(cos(x))
ⓘ Differentiating cos(x) gives -sin(x): ddx(cos(x)) = -sin(x)
▶Derivative:   -sin(x)

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