Qualification > Math
[CIE] All Pure Mathematics (P1, P2 and P3) doubts here !
EMO123:
--- Quote from: ~~!$!HUSH!$!~~ on May 01, 2011, 06:56:32 am ---MJ 2010 P11 Q1 parts 2 & 3,how are we supposed to solve such questions
--- End quote ---
this is from Mr. Astar
and for HUsh
but one thing i dont get is that i am not familier with cot x
so can anyone explain me the concept of cot x
SkyPilotage:
--- Quote from: EMO123 on May 01, 2011, 03:30:10 pm ---this is from Mr. Astar
and for HUsh
but one thing i dont get is that i am not familier with cot x
so can anyone explain me the concept of cot x
--- End quote ---
cotx is an A2 formula which is 1 over tanx = cosx over sinx
however I prefer using the tan property which is tanx=-tan(-x)
therefore tan(pi-x)= -tan(x-pi) = -tanx = -k *P.S : tan(x+180)=tan(x-180)=tanx since the tan graph repeats itself every 180 degrees unlike the six or cosine (360)
I hope tht clears the first part! :)
EMO123:
--- Quote from: SkyPilotage on May 01, 2011, 04:21:26 pm ---cotx is an A2 formula which is 1 over tanx = cosx over sinx
however I prefer using the tan property which is tanx=-tan(-x)
therefore tan(pi-x)= -tan(x-pi) = -tanx = -k *P.S : tan(x+180)=tan(x-180)=tanx since the tan graph repeats itself every 180 degrees unlike the six or cosine (360)
I hope tht clears the first part! :)
--- End quote ---
thanx man and +rep for the information
SkyPilotage:
--- Quote from: EMO123 on May 01, 2011, 04:25:34 pm ---thanx man and +rep for the information
--- End quote ---
No problem, Glad to help ;)
HUSH1994:
Thanks emo :)
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