You have to write down the antiderivative a to calculate the exact answer.
4.1
S.
sin(2x) dx
一八​

yes, i think so although i am not sure. this is a very strange question.

if you get paid hourly because if you get a salary you could work all week and only get paid a certain amount no matter how much you work but if you get paid hourly then you get paid for every minute you worked.

< 4 = < 5 they are vertical angles

120 degrees