Chain rule.
-4csc^2(4X)
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Afetr you take the first derivative you take it again Example y = x^2 dy/dx = 2x ( first derivative) d2y/dx2 = 2 ( second derivative)
The derivative of sec(x) is sec(x) tan(x).
Finding the derivative. The derivative is the measure of how a function changes as its input changes.
The derivative of sin(x) is cos(x).
Derivative of 1/x 1/x = x-1 Take the derivative (-1)x(-1-1) = -x-2 = 1/x2