Which formula?

For the circle one.. To find the arc, area all those..

my teacher mark correct for that, but I suggest you to play safe, the time is long enough for you to use the more troublesome math method

No. Because that involved radians and we didnt learn how to find rad in maths

my teacher will give me zero mark if I use add maths formula to find the length of arc

some will give and some wont give.
Most important thing is getting the answer correct.
You get answer correct then its full marks.
Only when your answer is wrong then the examiner will look at your workings.

There are 80 student , 35 student like maths , 40 student like science , 8 student like both how many student dont like these two subject , pls give me answer with working Thanks !

It depends on the teacher... I once used sin rule, cos rule to find angle.
My teacher said its okay if your answer is correct.

depends also lah, if that teacher who's marking your paper knows add maths formula then they'll give marks.

but got formula list right? so i think it's better to follow the formula inside the formula list..

use logarithm...

no la...i think u need to draw Venn Diagram with the universal set of 80 students, then got intersection....i dunno how to answer that

80, 35 like math, 40 like science 8 like both

I think 5 because 8 is union for math and science...80-75=5

the 8 people is among the same 75 people..

Correct me if Im wrong...

This post has been edited by Exa_Bytez: Nov 28 2010, 06:55 PM

the answer put 13 .. i have no idea about it ... gues i wanna ask you all a question like they say given sin x =3/5 find the value of cos y , i can find cos y but i dont know when must put - for the answer when no need put - for the answer can someone teach plssss?

ok,you just need to divide the student into 3 group A ( student like both subjects), B ( student like only math), C ( student like only science)

A=8
B=35-8=27
C=40-8=32

A+B+C= 67

80-67=13

so,there are 13 students do not like both subjects =D

This post has been edited by ahda: Nov 28 2010, 07:07 PM

agreee with ya

genius..

i wanna ask you all a question like they say given sin x =3/5 find the value of cos y , i can find cos y but i dont know when must put - for the answer when no need put - for the answer can someone teach plssss? thanks for that solution

no lar...-.- I also still learning, anyway good luck for tmr math exam

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Added on November 28, 2010, 7:14 pmeh, a bit blur sia == first where the y come from?

This post has been edited by ahda: Nov 28 2010, 07:21 PM

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This post has been edited by waie: Nov 28 2010, 07:31 PM

I like both.. satisfied u?.. So , i think it's 9 instead of 8

erm i dont know when must put - or no - for the answer the question is normaly in the objective section