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Find 
(d)/(dx)(-7cos x+2)
Answer:

Find ddx(7cosx+2) \frac{d}{d x}(-7 \cos x+2) \newlineAnswer:

Full solution

Q. Find ddx(7cosx+2) \frac{d}{d x}(-7 \cos x+2) \newlineAnswer:
  1. Identify function: Identify the function to differentiate.\newlineWe are given the function f(x)=7cos(x)+2f(x) = -7\cos(x) + 2 and we need to find its derivative with respect to xx.
  2. Apply rules: Apply the derivative rules.\newlineThe derivative of a constant is 00, and the derivative of cos(x)\cos(x) with respect to xx is sin(x)-\sin(x). We will use these rules to differentiate each term of the function.
  3. Differentiate first term: Differentiate the first term.\newlineThe first term is 7cos(x)-7\cos(x). The derivative of cos(x)\cos(x) is sin(x)-\sin(x), so the derivative of 7cos(x)-7\cos(x) is 7-7 times the derivative of cos(x)\cos(x), which is 7(sin(x))=7sin(x)-7(-\sin(x)) = 7\sin(x).
  4. Differentiate second term: Differentiate the second term.\newlineThe second term is a constant, 22. The derivative of a constant is 00, so the derivative of 22 with respect to xx is 00.
  5. Combine derivatives: Combine the derivatives of the terms.\newlineThe derivative of the function f(x)=7cos(x)+2f(x) = -7\cos(x) + 2 is the sum of the derivatives of its terms, which is 7sin(x)+07\sin(x) + 0.
  6. Simplify result: Simplify the result.\newlineSince adding 00 does not change the value, the final derivative of the function is simply 7sin(x)7\sin(x).

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