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The derivative of your problem y=cos3x is y = (- 3) sin 6x. Thanks for using AnswerParty! Have a great day!

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**Functions and mappings**
In most of mathematics and in some related technical fields, the term **mapping**, usually shortened to **map**, is either a synonym for *function*, or denotes a particular kind of function which is important in that branch, or denotes something conceptually similar to a function.

In graph theory, a **map** is a drawing of a graph on a surface without overlapping edges (a planar graph), similar to a political map.

**Differentiation rules**
This is a summary of **differentiation rules**, that is, rules for computing the derivative of a function in calculus.

**Second derivative**
In calculus, the **second derivative**, or the **second order derivative**, of a function *f* is the derivative of the derivative of *f*. Roughly speaking, the second derivative measures how the rate of change of a quantity is itself changing; for example, the second derivative of the position of a vehicle with respect to time is the instantaneous acceleration of the vehicle, or the rate at which the velocity of the vehicle is changing.

On the graph of a function, the second derivative corresponds to the curvature or concavity of the graph. The graph of a function with positive second derivative curves upwards, while the graph of a function with negative second derivative curves downwards.

**Chain rule**
In calculus, the **chain rule** is a formula for computing the derivative of the composition of two or more functions. That is, if *f* and *g* are functions, then the chain rule expresses the derivative of the composite function *f* ∘ *g* in terms of the derivatives of *f* and *g* and the product of functions · as follows:

If *u* is a function of a variable *v*, which is itself a function of *w* (see dependent variable), then *u* is also a function of *w* and the chain rule may be written

**Mathematical analysis**
**Mathematical analysis** is a branch of mathematics that includes the theories of differentiation, integration, measure, limits, infinite series, and analytic functions. These theories are usually studied in the context of real and complex numbers and functions. Analysis evolved from calculus, which involves the elementary concepts and techniques of analysis. Analysis may be distinguished from geometry. However, it can be applied to any space of mathematical objects that has a definition of nearness (a topological space) or specific distances between objects (a metric space).

Early results in analysis were implicitly present in the early days of ancient Greek mathematics. For instance, an infinite geometric sum is implicit in Zeno's paradox of the dichotomy. Later, Greek mathematicians such as Eudoxus and Archimedes made more explicit, but informal, use of the concepts of limits and convergence when they used the method of exhaustion to compute the area and volume of regions and solids. In India, the 12th century mathematician Bhāskara II gave examples of the derivative and used what is now known as Rolle's theorem.

**Differential calculus**
In mathematics, **differential calculus** is a subfield of calculus concerned with the study of the rates at which quantities change. It is one of the two traditional divisions of calculus, the other being integral calculus.

The primary objects of study in differential calculus are the derivative of a function, related notions such as the differential, and their applications. The derivative of a function at a chosen input value describes the rate of change of the function near that input value. The process of finding a derivative is called **differentiation**. Geometrically, the derivative at a point is the slope of the tangent line to the graph of the function at that point, provided that the derivative exists and is defined at that point. For a real-valued function of a single real variable, the derivative of a function at a point generally determines the best linear approximation to the function at that point.

**Analysis**
**Derivative**
**Mathematics**
**Law Crime**
**Law Crime**