For cosine, when it reach 2nd and 3rd quadrant, negative sign need to be put in.Just use your calculator to type in cosine with degree range 90<y<270, the answer you get must be negative.

This post has been edited by ahda: Nov 28 2010, 07:24 PM

If 0<X<90, sin, cos n tan r all positive
if 90<x<180, sin is + n other r -
if 180<x<270, tan is + n other r -
if 270<x<360, cos is + n other is -.

Hope this can help u.

Just remember ADD SUGAR TO COFFEE

wow, nice trick !! lolx

+1

ADD = ALL in quadrant 1
Sugar = Sine in quadrant 2
To = Tangent in quadrant 3
Coffee = Cosine in quadrant 4

EDITED

This post has been edited by jasss: Nov 28 2010, 07:33 PM

i mean the question there got a picture with an angle d , how to see a?

why?

Actually i 1 2 say "ALL SCIENCE TEACHER CRAZY" to remember the sin cos tan.

You mean circles? Depends on the diagram.

My teacher used to perasan by saying All Science Teachers Cute since she was teaching both maths and science lol.

Can u give one example?

my teacher use add sugar to coffee..

for picture question, you need to determine whether it is an obtuse or acute angle first. If it is a right angle triangle, the angle outside the triangle definitely is obtuse, thus it is in 2nd quadrant and negative sign is needed for the COS.

This post has been edited by ahda: Nov 28 2010, 07:42 PM

OMGGGGGGGGG!!! UR SIGGYYY!! SO CUTEEEEEEEEEEEEEEE!! <3



This post has been edited by Yvonne047: Nov 28 2010, 07:44 PM

Anyone can tell me if i get 1 or 2 marks for Moral from here?

Jelaskan satu nilai yang diamalkan oleh Datuk Dr. Shiekh Muszaphar Shukor dalam menjayakan misinya sebagai seorang angkasawan (2markah)

My answer :

Kerajinan. Datuk Dr. Shiek Muszaphar Shukor mempunyai usaha yang berterusan dengan semangat kegighan dan kecekalan.

Teacher gave me 1 mark only because she says i didn't put Watak and Situasi'. She says i should write like this if want to get 2 marks. Example : 'Datuk xxxx mempunyai nilai Kerajinan'. Then after my huraian as above, put 'Contohnya, dia menjalani latihan sebelum naik ke angkasa lepas'.

But when i ask the teacher next class. She says it is okay not to write the Watak before the nilai and the situasi.

So i want to know how your teacher teach u?

need to put watak la

since your mark will not be deduced if you write watak b4 nilai so it is better to play safe. For the huraian thingy, I am not so sure about that

Same with my teacher. Datuk xxxx "mengamalkan" nilai xxx. Datuk xxx ........(huraian) . for 2 marks. if 3 marks, write contoh.

This post has been edited by jasss: Nov 28 2010, 07:51 PM

This question only 2 marks and my teacher wants me to put 'situasi'. Situasi is contoh right?

But i think the space isn't long enough which is only 2 lines. The 'watak' mengamalkan nilai xxx already used more than half of the line. Plus the huraian and contoh.

This post has been edited by SkyHermit: Nov 28 2010, 07:53 PM