Identify Function and Rules: Identify the function that needs to be differentiated and the rules that will be applied. The function is y=3sec(2x), and we will use the chain rule for differentiation, which 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.
Differentiate Outer Function: Differentiate the outer function while keeping the inner function unchanged. The outer function is 3sec(u), where u=2x. The derivative of sec(u) with respect to u is sec(u)tan(u), so the derivative of 3sec(u) with respect to u is 3sec(u)tan(u).
Differentiate Inner Function: Differentiate the inner function. The inner function is u=2x, and its derivative with respect to x is dxdu=2.
Apply Chain Rule: Apply the chain rule by multiplying the derivatives of the outer and inner functions. The derivative of y with respect to x is dudy⋅dxdu=3sec(u)tan(u)⋅2.
Substitute Inner Function: Substitute the inner function back into the derivative to get the final answer. Replace u with 2x to get (dxdy)=3sec(2x)tan(2x)×2.
Simplify Final Derivative: Simplify the expression to get the final derivative. The final derivative is (dxdy)=6sec(2x)tan(2x).
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