(i) Using some simple properties of the integral, you have .
(ii) Note that .
For the final question, use the chain rule.
thank you. but for the last qn, i dont know what is a chain rule. how i would attemp this qn would be: because , then the ans for the qn will be 1/sinx . but i check the book my ans is wrong.
thank you. but for the last qn, i dont know what is a chain rule. how i would attemp this qn would be: because , then the ans for the qn will be 1/sinx . but i check the book my ans is wrong.
I'm not sure why you would be attempting this question if you don't know the chain rule.