Bytelearn - cat image with glassesAI tutor

Welcome to Bytelearn!

Let’s check out your problem:

We are given that 
(dy)/(dx)=(sin(y))/(x).
Find an expression for 
(d^(2)y)/(dx^(2)) in terms of 
x and 
y.

(d^(2)y)/(dx^(2))=

We are given that dydx=sin(y)x \frac{d y}{d x}=\frac{\sin (y)}{x} .\newlineFind an expression for d2ydx2 \frac{d^{2} y}{d x^{2}} in terms of x x and y y .\newlined2ydx2= \frac{d^{2} y}{d x^{2}}=

Full solution

Q. We are given that dydx=sin(y)x \frac{d y}{d x}=\frac{\sin (y)}{x} .\newlineFind an expression for d2ydx2 \frac{d^{2} y}{d x^{2}} in terms of x x and y y .\newlined2ydx2= \frac{d^{2} y}{d x^{2}}=
  1. Differentiate First Derivative: To find the second derivative of yy with respect to xx, we need to differentiate the first derivative with respect to xx. The first derivative is given by dydx=sin(y)x\frac{dy}{dx} = \frac{\sin(y)}{x}. We will use the quotient rule and the chain rule to differentiate this expression.
  2. Apply Quotient Rule: The quotient rule states that for a function h(x)=f(x)g(x)h(x) = \frac{f(x)}{g(x)}, the derivative h(x)h'(x) is given by h(x)=g(x)f(x)f(x)g(x)(g(x))2h'(x) = \frac{g(x)f'(x) - f(x)g'(x)}{(g(x))^2}. In our case, f(x)=sin(y)f(x) = \sin(y) and g(x)=xg(x) = x. We also need to remember that when we differentiate f(x)f(x) with respect to xx, we need to use the chain rule because yy is a function of xx.
  3. Differentiate sin(y)\sin(y): First, we differentiate f(x)=sin(y)f(x) = \sin(y) with respect to xx. Using the chain rule, we get f(x)=cos(y)dydxf'(x) = \cos(y) \cdot \frac{dy}{dx}. We already know that dydx=sin(y)x\frac{dy}{dx} = \frac{\sin(y)}{x}, so we can substitute this in to get f(x)=cos(y)sin(y)xf'(x) = \cos(y) \cdot \frac{\sin(y)}{x}.
  4. Differentiate xx: Next, we differentiate g(x)=xg(x) = x with respect to xx. The derivative of xx with respect to xx is 11, so g(x)=1g'(x) = 1.
  5. Apply Quotient Rule: Now we apply the quotient rule. We have h(x)=xcos(y)(sin(y))/xsin(y)1x2h'(x) = \frac{x \cdot \cos(y) \cdot (\sin(y))/x - \sin(y) \cdot 1}{x^2}. This simplifies to h(x)=cos(y)sin(y)sin(y)x2h'(x) = \frac{\cos(y) \cdot \sin(y) - \sin(y)}{x^2}.
  6. Factor out sin(y)\sin(y): We can factor out sin(y)\sin(y) from the numerator to get h(x)=sin(y)(cos(y)1)/(x2)h'(x) = \sin(y) \cdot (\cos(y) - 1)/(x^2).
  7. Final Second Derivative: This expression, h(x)h'(x), is the second derivative of yy with respect to xx, which we denote as d2ydx2\frac{d^2y}{dx^2}. Therefore, d2ydx2=sin(y)cos(y)1x2.\frac{d^2y}{dx^2} = \sin(y) \cdot \frac{\cos(y) - 1}{x^2}.