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@Apu
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+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.I think its c
Can you elaborate?
After simplification ( i can explain how to simply if needed) that sum 1/2^n tan(x/2^n) gets simplified to 1/2^ncotx(1/2^n)-cotx
Now put the limit and check
you will get 1/x-cotx and then pi/2 wli limit put krege to 2/pi aajyega
Ye how to simplify?
Jo cos wala relation hai usme dono side log leke diffrentiate kro
Sum 1/2^n tan1/2^n wli cheez ban jayegi
Ek minus sign ye niche jo cos ka log fir diffr hai waha se common leke right side bhejdo to ye ban jayega sum tan wli cheez
Oh I see.
Thanks a lot.
+solved @Real potato
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