A. Maths. Trigonometry Question

水龍蜥

Originally posted by oscar at 2005-1-7 09:27 PM:


我尋日見到佢有睇呢個post...

o.......係咩,可能佢都唔識掛

oscar

Originally posted by 水龍蜥 at 2005-1-7 21:29:

o.......係咩,可能佢都唔識掛

但係佢連微積分都識，我唔信trigo佢唔識...

水龍蜥

Originally posted by oscar at 2005-1-7 09:32 PM:


但係佢連微積分都識，我唔信trigo佢唔識...

係咩,不過同我講都冇用,我都唔知咩係連微積分[E-TeH]

oscar

Originally posted by 水龍蜥 at 2005-1-7 21:36:

係咩,不過同我講都冇用,我都唔知咩係連微積分[E-TeH]

唉...總之佢學既野已超越佢本身既級數~

細薯

我G.Math. just finish teaching  "log"
準備teach trigonometry
but A.Math. not yet

Originally posted by oscar at 2005-1-7 09:37 PM:


唉...總之佢學既野已超越佢本身既級數~

你都係la~~XD

水龍蜥

Originally posted by oscar at 2005-1-7 09:37 PM:


唉...總之佢學既野已超越佢本身既級數~

佢讀中幾嫁?

細薯

Originally posted by 水龍蜥 at 2005-1-7 09:40 PM:

佢讀中幾嫁?

form 4

hey~~he is now at this region~~~~~

抹茶可樂

今日份a.maths卷出現相似題目…好彩響試場好快就諗到了- -"

LHS=(1-cscA+cotA)/(1+cscA-cotA)

(1-cscA+cotA)(1+cscA)
=1-cscA+cotA+cscA-cscAcscA+cscAcotA
=1-cscAcscA-cscA+cscA+cotA+cscAcotA
=-cotAcotA+cotA+cscAcotA
=cotA(1+cscA-cotA)

(1-cscA+cotA)(1+cscA)=cotA(1+cscA-cotA)
(1-cscA+cotA)/(1+cscA-cotA)=cotA/(1+cscA)

LHS=RHS

oscar

Originally posted by smallpotato226 at 2005-1-7 21:38:
我G.Math. just finish teaching  "log"
準備teach trigonometry
but A.Math. not yet


你都係la~~XD

其實以前中三已經教左log，不過而家既syllabus改曬，越改越易...

=.=我只係對Maths、Physics同Chem係咁，其他科唔會咁熱愛...

水龍蜥

Originally posted by 落雷 at 2005-1-7 09:41 PM:
今日份a.maths卷出現相似題目…好彩響試場好快就諗到了- -"

LHS=(1-cscA+cotA)/(1+cscA-cotA)

(1-cscA+cotA)(1+cscA)
=1-cscA+cotA+cscA-cscAcscA+cscAcotA
=1-cscAcscA-cscA+cscA+cotA+cscAcotA
...

好高深,一d都睇唔明