MediumDifferentiation rules

Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §4.4 Inverses of Trigonometric Functions, #31 · Calculus · Differentiation rules

If … find … in terms of

If $y = tan x$ find $sec x$ in terms of $y$ .

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §4.4 Inverses of Trigonometric Functions, #31

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