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Given that 
y=v^(2)+5, find 
(d)/(dv)(5v^(3)-2sin y) in terms of only 
v.
Answer:

Given that y=v2+5 y=v^{2}+5 , find ddv(5v32siny) \frac{d}{d v}\left(5 v^{3}-2 \sin y\right) in terms of only v v .\newlineAnswer:

Full solution

Q. Given that y=v2+5 y=v^{2}+5 , find ddv(5v32siny) \frac{d}{d v}\left(5 v^{3}-2 \sin y\right) in terms of only v v .\newlineAnswer:
  1. Identify Function and Relationship: Identify the function to differentiate and the given relationship between yy and vv. We need to differentiate 5v32sin(y)5v^3 - 2\sin(y) with respect to vv, and we are given that y=v2+5y = v^2 + 5.
  2. Apply Chain Rule: Apply the chain rule to differentiate 5v32sin(y)5v^3 - 2\sin(y) with respect to vv. The derivative of 5v35v^3 with respect to vv is 15v215v^2. The derivative of 2sin(y)-2\sin(y) with respect to vv is 2cos(y)dydv-2\cos(y) \cdot \frac{dy}{dv}, where dydv\frac{dy}{dv} is the derivative of yy with respect to vv.
  3. Differentiate y=v2+5y = v^2 + 5: Differentiate y=v2+5y = v^2 + 5 with respect to vv to find dydv\frac{dy}{dv}. The derivative of v2v^2 with respect to vv is 2v2v. The derivative of a constant, 55, is 00. So, dydv=2v\frac{dy}{dv} = 2v.
  4. Substitute dydv\frac{dy}{dv}: Substitute dydv\frac{dy}{dv} into the derivative of 2sin(y)-2\sin(y) with respect to vv. We have 2cos(y)dydv=2cos(y)2v-2\cos(y) \cdot \frac{dy}{dv} = -2\cos(y) \cdot 2v.
  5. Combine Derivatives: Combine the derivatives to get the final answer.\newlineThe derivative of 5v35v^3 with respect to vv is 15v215v^2.\newlineThe derivative of 2sin(y)-2\sin(y) with respect to vv is 4vcos(y)-4v \cdot \cos(y).\newlineSo, the derivative of 5v32sin(y)5v^3 - 2\sin(y) with respect to vv is 15v24vcos(y)15v^2 - 4v \cdot \cos(y).
  6. Replace yy in Final Derivative: Replace yy with v2+5v^2 + 5 in the final derivative expression.\newlineSince y=v2+5y = v^2 + 5, we substitute yy with v2+5v^2 + 5 in the cosine term to express the derivative entirely in terms of vv.\newlineThe final derivative is 15v24vcos(v2+5)15v^2 - 4v \cdot \cos(v^2 + 5).

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