Lesson 13: The Second Derivative

Students need to run a similar investigation into d dx (cos f (x)) =- f '(x)sin⁡ f (x) Lead students to use the quotient rule to determine the derivative d dx (tan x)= sec 2 x by using the identity tan x = sin x cos x. Use this result to lead students to apply the chain rule to determine d dx (tan f x)= f ' x sec 2 f(x) ................
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