[[我有M1/M2數要問]] HKDSE M2 Q20241201|| Mathematical Induction|| Summation to infinity|| HKDSE M2

[[我有M1/M2數要問]] HKDSE M2 Q20241201|| Mathematical Induction|| Summation to infinity|| HKDSE M2
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Dr.K.Liu Maths-Erudition Education 博學習坊
/ eruditioneducation
Instagram account & link :
drkliu_math

[@DrKLiuMaths]

歡迎各位同學, 老師, 家長發表有意義的意見, 多多討論!!!

[@noobnoob8782]

thanks for the help

[@DrKLiuMaths]

No problem!

[@expl0s10n]

I think this is out of scope in dse, as dse m2 do not require limit of sequences

[@kwokhunghui7521]

Dr Liu, the email I attached a text in which you can find the whole question has sent to you. Thank you!

[@DrKLiuMaths]

Got it!

[@kwokhunghui7521]

sorry Dr liu, i lost your email, please help send to me again to send you the whole question

[@kwokhunghui7521]

可否幫忙。reduction formula for integration from 0 to pi, of cos^2 nx/cos^x😢😢

[@kwokhunghui7521]

sorry,typo, cos^2 nx/cos^ 2 x

[@DrKLiuMaths]

I(n) = inte (cos(nx))^2 / (cosx)^2 ??

[@kwokhunghui7521]

@DrKLiuMaths Yes, the reduction formula and for all odd values of n, limits are 0 to pi, Cambridge exam question. I can obtain (cosnx)/cosx

[@DrKLiuMaths]

here is my email, can you send me the whole question, let me see see first.
[e-mail]

[@DrKLiuMaths]

By using I(n) = inte (cos(nx))^2 / (cosx)^2, i obtain an very complicated formula.
I will post them step by step in my channel