Identify Function: Identify the function to differentiate. The function given is y=2cot3(x), which means y=2[cot(x)]3.
Apply Chain Rule: Recognize that to differentiate y with respect to x, we need to apply the chain rule because we have a function raised to a power. The chain rule states that the derivative of a composite function f(g(x)) is f′(g(x))g′(x).
Differentiate Outer Function: Differentiate the outer function first, keeping the inner function the same. The outer function is u3 where u=cot(x), and its derivative with respect to u is 3u2. So, the derivative of the outer function with respect to cot(x) is 3[cot(x)]2.
Differentiate Inner Function: Now, differentiate the inner function, which is cot(x). The derivative of cot(x) with respect to x is −csc2(x), where csc(x) is the cosecant function.
Apply Chain Rule Again: Apply the chain rule by multiplying the derivative of the outer function by the derivative of the inner function. This gives us the derivative of y with respect to x: dxdy=3[cot(x)]2×(−csc2(x)).
Multiply by Constant Factor: Finally, multiply the result by the constant factor from the original function, which is 2. This gives us dxdy=2×3[cot(x)]2×(−csc2(x)).
Simplify and Final Answer: Simplify the expression by combining constants and writing the final answer. The constants 2 and 3 can be multiplied together to give 6, and the negative sign remains. So, the final answer is dxdy=−6[cot(x)]2⋅csc2(x).
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