Justify, in one or two sentences, that…

MATHEMATICS · Subjective · AP · Calculus AB · Differentiation: Definition and Fundamental Properties · Differentiation: Definition and Fundamental Properties

Problem

Justify, in one or two sentences, that

\dfrac{d}{dx}\left(\dfrac{\sin x}{\cos x}\right)=\sec^{2}x

Related theory

Trigonometric Identities
Trigonometric Functions
Differentiation Rules
Derivatives of standard functions via chain rule
Derivatives of composite functions
Continuity and Differentiability

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