Q. Using implicit differentiation, find dxdy.sin(xy)=2x4y3+4
Apply Chain and Product Rule: Differentiate both sides of the equation with respect to x using implicit differentiation.The left side of the equation is sin(xy), which is a product of x and y, so we will need to use the product rule in combination with the chain rule. The right side of the equation is 2x4y3+4, which is a sum of terms involving products of x and y, so we will also need to use the product rule there.
Differentiate sin(xy): Differentiate the left side, sin(xy), with respect to x. Using the chain rule, the derivative of sin(u) with respect to u is cos(u), and then we multiply by the derivative of u with respect to x, where u=xy. This gives us cos(xy)⋅(y+xdxdy).
Differentiate 2x4y3+4: Differentiate the right side, 2x4y3+4, with respect to x. Using the product rule, the derivative of 2x4y3 with respect to x is 2×(4x3y3+x4×3y2dxdy). The derivative of the constant 4 with respect to x is 0.
Write Differentiated Equation: Write down the differentiated equation.cos(xy)⋅(y+xdxdy)=2⋅(4x3y3+x4⋅3y2dxdy)+0
Solve for dxdy: Solve for dxdy. We need to collect all terms involving dxdy on one side and the rest on the other side to solve for dxdy. cos(xy)⋅xdxdy−2x4⋅3y2dxdy=2⋅4x3y3−cos(xy)⋅y
Factor out dxdy: Factor out dxdy from the terms on the left side.dxdy(x⋅cos(xy)−2x4⋅3y2)=2⋅4x3y3−cos(xy)⋅y