Differentiate y = x³Vx. EXAMPLE 8 SOLUTION Since both the base and the exponent are variable, we use logarithmic differentiation: In y = In( x³Vx) = 3V In(x) * = 3V. + (In(x)) · y 3 In(x) y' = y + Another method is to write x³Vx = eln( d dx %3D dx %3D

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Fundamentals of Trigonometric Identities

Trigonometric Identities are the equalities that involve trigonometry functions and hold for all the values of variables given in the equation.