Trig functions have their own special derivatives that you will have to memorize.
For instance:
the derivative of sinx is cosx.
The derivative of cosx is -sinx
The derivative of tanx is sec2x
The derivative of cscx is -cscxcotx
The derivative of secx is secxtanx
The derivative of cotx is -csc2x
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Yes, sine is a trig function, it is opposite over hypotenuse.
well, the second derivative is the derivative of the first derivative. so, the 2nd derivative of a function's indefinite integral is the derivative of the derivative of the function's indefinite integral. the derivative of a function's indefinite integral is the function, so the 2nd derivative of a function's indefinite integral is the derivative of the function.
A null derivative occurs when an increasing function does not have a derivative. This is most commonly seen in the question mark function.
The Geometrical meaning of the second derivative is the curvature of the function. If the function has zero second derivative it is straight or flat.
A linear function, for example y(x) = ax + b has the first derivative a.