Mathematics: Post your doubts here!

[Muzammil100]

this i sfor what????

That was for my question I believe!

 

[Lost_Life]

That was for my question I believe!

oh, hey um i don' t get how to solve it

 

[Lost_Life]

dude just fr enjoyment after studying so hard

im a dudette -.-' lol

 

[Muzammil100]

Can anybody help me in this question

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w11_qp_41.pdf

Q 6 ) From b) onwards

What is obtuse angle. That thing made my whole answer go wrong!

 

[NIM]

im a dudette -.-' lol

 

[Muzammil100]

im a dudette -.-' lol

Which question were you having problem with?

 

[Lost_Life]

mj 2010 paper 4 q 10 c varient 2

 

[Muzammil100]

mj 2010 paper 4 q 10 c varient 2

Ok wait a minute!

 

[sma786]

A rod has length 2.9 m, correct to 1 decimal place.
What is the upper bound for the length of the rod?

 

[NIM]

Can anybody help me in this question

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w11_qp_41.pdf

Q 6 ) From b) onwards

What is obtuse angle. That thing made my whole answer go wrong!

obtuse angle means "more than 90 "..

 

[Lost_Life]

A rod has length 2.9 m, correct to 1 decimal place.
What is the upper bound for the length of the rod?

upper : 2.95 lower: 2.85

 

[Muzammil100]

mj 2010 paper 4 q 10 c varient 2

Hope that helps

 

[NIM]

A rod has length 2.9 m, correct to 1 decimal place.
What is the upper bound for the length of the rod?

question paper 2011 may/june question 2 c i...rite!!!!
i guess 2.95...

 

[Muzammil100]

Hope this helps also the answer is in Q10

 

[Muzammil100]

Can anybody help me in this question

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w11_qp_41.pdf

Q 6 ) From b) onwards

Obtuse is more than 90 so................

 

[sma786]

upper : 2.95 lower: 2.85

yeah ur ryt, but how do u get it ? i knw its a stupid questn.. buh i thnk it shd b 3.4 .. =\

 

[sma786]

Question 5(a) and 7 (a)

 

[sma786]

Can anybody help me in this question

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w11_qp_41.pdf

Q 6 ) From b) onwards

Obtuse is more than 90 so................

Sin 26/79 = Sinx/135 .. cross multiply we get 0.74911 etc, Sin inverse this, we get 48.51 .. its askng the obtuse value, so 48.51 - 360 = 131.5 ... there u go hope i helped

then in part c, 131.5+26-180 = 22.5 .. so , Sin90/79 = Sin22.5/x .. cross multiply u get 30.23 .. there u go again

then in part d, area of the big trianglle, is 0.5*95*120*sin77 .. u get 5554/180 = 30.85 .. a houses cannot b in decimals so its 30

 

[Rabb94]

DOUBT

October/November 2011 PAPER 41 Q:5 c(ii) AND Q 2a
PLZZ IF SOMEONE CAN HELP

 

[Muzammil100]

Sin 26/79 = Sinx/135 .. cross multiply we get 0.74911 etc, Sin inverse this, we get 48.51 .. its askng the obtuse value, so 48.51 - 360 = 131.5 ... there u go hope i helped

then in part c, 131.5+26-180 = 22.5 .. so , Sin90/79 = Sin22.5/x .. cross multiply u get 30.23 .. there u go again

then in part d, area of the big trianglle, is 0.5*95*120*sin77 .. u get 5554/180 = 30.85 .. a houses cannot b in decimals so its 30

Thanks but
"48.51 - 360 = 131.5"