27–40. Implicit differentiation Use implicit differentiation to find dy/dx.
sin x+sin y=y

Implicit differentiation is a technique used to differentiate equations where the dependent and independent variables are not explicitly separated. Instead of solving for one variable in terms of the other, we differentiate both sides of the equation with respect to the independent variable, applying the chain rule when necessary. This method is particularly useful for equations involving both x and y, allowing us to find the derivative of y with respect to x.

The chain rule is a fundamental principle in calculus that allows us to differentiate composite functions. It states that if a function y is defined as a function of u, which in turn is a function of x, then the derivative of y with respect to x can be found by multiplying the derivative of y with respect to u by the derivative of u with respect to x. This rule is essential in implicit differentiation, especially when differentiating terms involving y.

Trigonometric functions, such as sine and cosine, are fundamental functions in calculus that relate angles to ratios of sides in right triangles. In the context of the given equation, sin x and sin y represent the sine of the angles x and y, respectively. Understanding the properties and derivatives of these functions is crucial for applying implicit differentiation, as their derivatives (e.g., the derivative of sin y is cos y dy/dx) will be used in the differentiation process.