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Which calculator is allowed officially in Cie Add.Maths Examinations...???
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Assalam o alaikum! I'm interested in doing Add Maths, on my own as I can't have tutions or anything else here. So is it like possible? Me studying through internet and books all on my own?
Someone please tell me what is upper bound and lower bound and how do you calclulate it?
P.S. Is this topic anywhere in the Ds?
Thanksits in Book 4 addendum..chapter 1
Thanks
After the initiative taken by Math_angel in the IGCSE section, I have made this topic for students of O'levels. You can post any question or any problem here and me along with other XPF users will try to help you as soon as possible. This topic is a feasible option as it won't bring a hassle of making new topics for every question and it will also allow the helpers to not miss any of your questions and have one common topic for answering your Mathematics queries.
So start posting your problems.
See, this is easy.heres my prob: the Q is
8 – 3t > 14 + t
my answer is not right and the anser in marking scheme is written as (t) < –1.5, –1 1/2, or -3/2.
please explain the procedure...
Somebody help me with this please. It's a fairly simple question and despite applying the correct formula, I don't seem to get the answer right.
Section B, Question 8(a)
http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_s12_qp_22.pdf
thnxSee, this is easy.
8-3t>14+t
8>14+t+3t
8>14+4t
8-14>4t
-6>4t
-6/4>t
-3/2 or -1.5>t
See, this is easy.
8-3t>14+t
8>14+t+3t
8>14+4t
8-14>4t
-6>4t
-6/4>t
-3/2 or -1.5>t
no thats 1 and then 1/2..in mixed numbers
I did that like thrice but I'm not getting the correct answer, mind doing that for me?apply cosine rule on it.
and then you get 128.39something.
OW YEAH! me rox
I did that like thrice but I'm not getting the correct answer, mind doing that for me?
Thanks, I guess. But my dheet calculator still gives 51 as the answermust be some calculation error.
21.3 (squared) = 20 (squared) + 2 (squared) - 2*20*2*cos.AngleABC
453.69 = 404 - 80*cos.AngleABC
453.69 - 404 = - 80*cos.AngleABC
AngleABC = cos^-1 (-49.69/80)
AngleABC = 128.39
Thanks, I guess. But my dheet calculator still gives 51 as the answer
Thanks, I guess. But my dheet calculator still gives 51 as the answer
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