Find the derivative and simplify. y = -3xcosx Help!?
1 Answer
Jul 24, 2017
Explanation:
#"differentiate using the "color(blue)"product rule"#
#"given "y=f(x)g(x)" then"#
#dy/dx=f(x)g'(x)+g(x)f'(x)larr" product rule"#
#f(x)=-3xrArrf'(x)=-3#
#g(x)=cosxrArrg'(x)=-sinx#
#rArrdy/dx=-3x(-sinx)+cosx(-3)#
#color(white)(rArrdy/dx)=3xsinx-3cosx#