Trigonometric series
I tried multiplying and dividing by sin to convert it to double angle but after that I'm stuck, or is this solved by some other way?
16 Replies
@Apu
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.Group the terms from beginning and end. That should help.
2cosAcosB?
Yeah
Multiply divide by 2 too
Nvm that won't work
Yea just cos 1000a appears in every term
This reminds me of the n-th roots of unity questions in complex numbers but I've forgotten how to solve :sweaty:
@SirLancelotDuLac
Is this resolved?
Not for me lol
Following this train of thought would give this ig.
Yeah, I would've never gotten it. I got it till α+1/α and so on. Thanks a bunch.
What did u do in this
Write cos as (z+1/z)/2, take modulus (since the given quantity must be real) and do some manipulations.
Oh i see
I did get a solution by someone too
oh man why do i completely forget everything in a few months 😭