Hi.guys i have some confusion on the fundamental therom of calculus. here is my question. 1. somethimes when i use the fundamental therom of calculus which is F(a) - F(b). the out come will be negative .in the same question when i type in my calculator its only give me positive i guess is the area. for example Integral of sinx dx from 0 to 1.5 when i did by hand using FTC its gives me -0.929 but in the calculator its 0.929.I am guesing it the calculator only give the area.(not sure) so i need explanation on this . F=derivative of function.