Differentiating Trigonometric Functions

Question 1 • AP Calculus AB - MA5186 A

The intensity of a lightbulb in lumens, l, at time t in minutes is given by l(t) = 4 cos t + 2700. Approximately how much is the intensity changing after 20 minutes?

Answer

−4.1 lumens/minute

−3.7 lumens/minute

1.2 lumens/minute

2.7 lumens/minute

Example Problem: Using Trigonometric Functions and the Product Rule

Example Problem: Using Trigonometric Functions and the Quotient Rule

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