Derivatives of Trigonometric Functions
2 Derivative Definitions We can now use the limit of the difference quotient and the sum/difference formulas for trigonometric functions to determine the following derivatives.
3 Try These Find the derivative.
4 Examples 1. Find the equation of the tangent line to the curve at the point. 2. Determine
5 Limit Definitions Since, Therefore,
6 Limit Definitions
7 Try These In both of the previous definitions, θ can take on many forms. Here are a few examples.
8 Try These Evaluate. A common effective strategy is to separate the quotient into a product.