*\[\mathop \limits_ \frac = \mathop \limits_ \frac = 6\mathop \limits_ \frac\] Note that we factored the 6 in the numerator out of the limit.At this point, while it may not look like it, we can use the fact above to finish the limit.*

The differentiation of trigonometric functions is the mathematical process of finding the derivative of a trigonometric function, or its rate of change with respect to a variable.

Common trigonometric functions include sin(x), cos(x) and tan(x).

For example, the derivative of f(x) = sin(x) is represented as f ′(a) = cos(a).

f ′(a) is the rate of change of sin(x) at a particular point a.

Using the Pythagorean theorem and the definition of the regular trigonometric functions, we can finally express dy/dx in terms of x.

We're sorry, this computer has been flagged for suspicious activity.Using implicit differentiation and then solving for dy/dx, the derivative of the inverse function is found in terms of y.To convert dy/dx back into being in terms of x, we can draw a reference triangle on the unit circle, letting θ be y.Let θ be the angle at O made by the two radii OA and OB.Since we are considering the limit as θ tends to zero, we may assume that θ is a very small positive number: The following derivatives are found by setting a variable y equal to the inverse trigonometric function that we wish to take the derivative of.All derivatives of circular trigonometric functions can be found using those of sin(x) and cos(x).The quotient rule is then implemented to differentiate the resulting expression.See the Proof of Trig Limits section of the Extras chapter to see the proof of these two limits. Students often ask why we always use radians in a Calculus class. The proof of the formula involving sine above requires the angles to be in radians.If the angles are in degrees the limit involving sine is not 1 and so the formulas we will derive below would also change.If your device is not in landscape mode many of the equations will run off the side of your device (should be able to scroll to see them) and some of the menu items will be cut off due to the narrow screen width.With this section we’re going to start looking at the derivatives of functions other than polynomials or roots of polynomials.

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