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Chapter 13 of 46

Products, Quotients, and the Rest of Trig

(fg)′ is not f′g′ — a growing rectangle shows what really happens when two changing quantities multiply.

Free12–16 min

By the end

Each chapter closes with capabilities, not topics. Watch for these.

01Apply the product rule with a visual justification
02Apply the quotient rule
03Derive the derivatives of tan, cot, sec, and csc from the quotient rule