I need to derive this equation and get the below result.
Also a hint teacher gave us:
replace
by
by
I tried few things (like ) to involve complex numbers in the first equation but im confused and have no clue what to do.
I need to derive this equation and get the below result.
Also a hint teacher gave us:
replace
by
by
I tried few things (like ) to involve complex numbers in the first equation but im confused and have no clue what to do.
Hi Nrt,
The first equation
is an identity-- it is true for all values of a and b.
Now
so
.
Now let and , so .
Then the identity becomes
so
.
This is the result you were asked to show, except that I used x and y instead of a and b. It seems less confusing to me that way. (I get confused very easily). But you can go back and replace x and y with a and b if you prefer it that way.