Question

y= Acosx+Bcoshx find the second derivative​

Answer 1

here is ur answer (h t t p s : / / s o c r a t i c . o r g / q u e s t i o n s / h o w - d o - y o u - f i n d - t h e - s e c o n d - d e r i v a t i v e - o f  - y - a c o  s - b x # 4 6  5 6 4 3 )