Q. Let g(x)=etan(x).Find g′(x).Choose 1 answer:(A) etan(x)(B) etan(x)sec2(x)(C) tan(x)etan(x)−1(D) esec2(x)
Apply Chain Rule: Apply the chain rule to differentiate g(x)=etan(x).The chain rule states that the derivative of a composite function is the derivative of the outer function evaluated at the inner function times the derivative of the inner function.
Identify Functions: Identify the outer and inner functions.The outer function is eu, where u is the inner function.The inner function is tan(x).
Differentiate Outer Function: Differentiate the outer function with respect to the inner function.The derivative of eu with respect to u is eu.So, (dud)(eu)=eu.
Differentiate Inner Function: Differentiate the inner function with respect to x. The derivative of tan(x) with respect to x is sec2(x). So, (dxd)(tan(x))=sec2(x).
Apply Chain Rule Again: Apply the chain rule using the derivatives from steps 3 and 4.g′(x)=dud(eu)⋅dxd(tan(x))g′(x)=etan(x)⋅sec2(x).
Match Answer Choices: Match the result with the given answer choices.The correct answer is (B) etan(x)sec2(x).
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