Here's the question you clicked on:
soty2013
integrate
differentiating sin and cos sin when differentiated goes to Cos cos when differentiated goes to -Sin so it will be the other way round for the negatives so -Sin when differentiated goes to -cos -cos when differentiated goes to sin so the integral is working backwards
do you need more help?
okay differentiating sin gives us cos so if you were to integrate cos that would give you sin as you are going backwards so if you differentiate cos this gives us -sin so if you integrate -sin you would get cos differentiating -sin gives you -cos integrating -cos gives you -sin so if differentiating -cos gives you sin integrating sin.... hope this helps lol