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Find dydx:y=csc(2x4+6)\frac{dy}{dx}: y=\csc(2x^{4}+6)

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Q. Find dydx:y=csc(2x4+6)\frac{dy}{dx}: y=\csc(2x^{4}+6)
  1. Apply Chain Rule: To find the derivative of yy with respect to xx, we need to apply the chain rule. 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. In this case, the outer function is csc(u)\csc(u) and the inner function is u=2x4+6u = 2x^4 + 6.
  2. Derivative of Outer Function: First, we find the derivative of the outer function csc(u)\csc(u) with respect to uu. The derivative of csc(u)\csc(u) is csc(u)cot(u)-\csc(u)\cot(u). We will substitute uu back in later.
  3. Derivative of Inner Function: Next, we find the derivative of the inner function u=2x4+6u = 2x^4 + 6 with respect to xx. The derivative of 2x42x^4 with respect to xx is 8x38x^3, and the derivative of 66 with respect to xx is 00. So, the derivative of uu with respect to xx is 8x38x^3.
  4. Apply Chain Rule Again: Now we apply the chain rule by multiplying the derivative of the outer function by the derivative of the inner function. This gives us:\newlinedydx=csc(u)cot(u)×dudx\frac{dy}{dx} = -\csc(u)\cot(u) \times \frac{du}{dx}\newline =csc(2x4+6)cot(2x4+6)×8x3= -\csc(2x^4 + 6)\cot(2x^4 + 6) \times 8x^3
  5. Final Derivative: We have found the derivative of yy with respect to xx in terms of xx. The derivative is:\newlinedydx=8x3csc(2x4+6)cot(2x4+6)\frac{dy}{dx} = -8x^3 \cdot \csc(2x^4 + 6) \cdot \cot(2x^4 + 6)

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