Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §2.5 The Product and Quotient and Power Rules, #43 · Calculus · Differentiation rules

If you change from … to its tangent line at …, find…

If you change from $f (t) = t cos t$ to its tangent line at $t = π /2$ , find the two-part function $df / d t$ .

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §2.5 The Product and Quotient and Power Rules, #43

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