How do you find dy/dx for the function; cos(x^2+2Y)+xe^Y^2=1? Calculus Basic Differentiation Rules Implicit Differentiation 1 Answer Eddie Apr 11, 2017 #dy/dx = (2x sin(x^2+2y)-e^(y^2))/( - 2sin(x^2+2y)+ 2xye^(y^2))# Explanation: Using the implicit function theorem: #f(x,y) = cos(x^2+2y)+xe^(y^2) = 1# #df = 0 = f_x dx + f_y dy implies dy/dx = - (f_x)/(f_y)# So: #f_x = -2x sin(x^2+2y)+e^(y^2)# #f_y = - 2sin(x^2+2y)+ 2xye^(y^2)# #dy/dx = - (f_x)/(f_y) = (2x sin(x^2+2y)-e^(y^2))/( - 2sin(x^2+2y)+ 2xye^(y^2))# Answer link Related questions What is implicit differentiation? How do you find the derivative using implicit differentiation? How do you find the second derivative by implicit differentiation? How do you find #y''# by implicit differentiation of #x^3+y^3=1# ? How does implicit differentiation work? How do you use implicit differentiation to find #(d^2y)/dx^2# of #x^3+y^3=1# ? How do you Use implicit differentiation to find the equation of the tangent line to the curve... How do you use implicit differentiation to find #y'# for #sin(xy) = 1#? How do you find the second derivative by implicit differentiation on #x^3y^3=8# ? What is the derivative of #x=y^2#? See all questions in Implicit Differentiation Impact of this question 7480 views around the world You can reuse this answer Creative Commons License