How do you resolve an issue that happened in school that you never got to solve before graduation ?
How do you prove -LSB- math -RSB- \ int_0 ^ -LCB- 2 \ pi -RCB- \ sin -LRB- mt -RRB- \ cos -LRB- nt -RRB- \ , dt = 0 -LSB- / math -RSB- for any integer -LSB- math -RSB- n -LSB- / math -RSB- and -LSB- math -RSB- m -LSB- / math -RSB- ?