IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => IGCSE/ GCSE => Math => Topic started by: MissDE on May 15, 2009, 08:55:30 pm

Title: Maths help
Post by: MissDE on May 15, 2009, 08:55:30 pm: Maths
June 2005
Paper 4
Question 2/c

I don't understand at all!
how do they use the tan rule, it's not a triangle !!
and where did the 1.5 come from..?

need help guyz..
Title: Re: Maths help
Post by: MissDE on May 16, 2009, 08:34:34 am: ???
Title: Re: Maths help
Post by: Q80BOY on May 16, 2009, 09:06:18 am: just draw the trapezium

the base = 12 cm

the upper part = 9 cm
(the middle should be at 4.5)

and the height is 7 cm
Title: Re: Maths help
Post by: 7RAR7 on May 16, 2009, 09:15:06 am: whats the tan rule
Title: Re: Maths help
Post by: Q80BOY on May 16, 2009, 09:25:57 am: Quote from: 7RAR7 on May 16, 2009, 09:15:06 am
whats the tan rule

is there a tan rule? i only know the sine and cosine rules
Title: Re: Maths help
Post by: SGVaibhav on May 16, 2009, 09:26:28 am: he is lost!
Title: Re: Maths help
Post by: astarmathsandphysics on May 16, 2009, 09:29:19 am: Never heard of the tan rule.
Title: Re: Maths help
Post by: Q80BOY on May 16, 2009, 09:29:26 am: Quote from: sgvaibhav on May 16, 2009, 09:26:28 am
he is lost!

ya, i think so, cause the question doesnt ask for any calculations, just constructing :-\
Title: Re: Maths help
Post by: Q80BOY on May 16, 2009, 09:31:12 am: Quote from: astarmathsandphysics on May 16, 2009, 09:29:19 am
Never heard of the tan rule.

its easy, apply sun tan before going to the beach :P

so lame right ? ;D
Title: Re: Maths help
Post by: AS girl on May 16, 2009, 09:43:09 am: I uploaded the answer!! You dont have to use any rule!!!
Title: Re: Maths help
Post by: MissDE on May 16, 2009, 09:49:11 am: IG girl u r great! :D

And guyz.... are u serious???
I mean, dont u knw the tan rule?

It says---> opposite lenght/adjecent length....
Title: Re: Maths help
Post by: AS girl on May 16, 2009, 09:50:04 am: lool i guess everyone know the Tan rule by now!!!
Title: Re: Maths help
Post by: Ukhti-R on May 16, 2009, 09:52:54 am: No Q80, that actually made me laugh !!! :D
Title: Re: Maths help
Post by: SGVaibhav on May 16, 2009, 09:56:59 am: is there actually a tan rule

i am not talking about tan x=opp/adj

im asking does a tan rule exist in reality?
Title: Re: Maths help
Post by: Ukhti-R on May 16, 2009, 09:58:40 am: not in IG's bt in A level
we only got sine and cosine
Title: Re: Maths help
Post by: Q80BOY on May 16, 2009, 10:00:47 am: Quote from: Roxy on May 16, 2009, 09:58:40 am
not in IG's bt in A level
we only got sine and cosine

ya thats what i know, never heard of the tan rule
Title: Re: Maths help
Post by: Ukhti-R on May 16, 2009, 10:02:51 am: wot do mean u never heard of it be4, u wethe on wh sed to apply sun tan 4 going to the beach .:P

Even lamer..:P
Title: Re: Maths help
Post by: SGVaibhav on May 16, 2009, 10:03:13 am: yeahhhhh

tan rule exists

PARTY TIME!
Title: Re: Maths help
Post by: Q80BOY on May 16, 2009, 10:04:29 am: Quote from: Roxy on May 16, 2009, 10:02:51 am
wot do mean u never heard of it be4, u wethe on wh sed to apply sun tan 4 going to the beach .:P

Even lamer..:P

haha ;D and dont forget the sun glasses 8)