Maths, Addmaths and Statistics: Post your doubts here!

[Saad Mughal]

These vectors ae just unut vectors which show direction. We need to find vector. Thats why we multiply so magnitude of vector is same as the magnitude given.

Yeah, that I know that the magnitude is equal to the magnitude of the velocity vector.
BUT, my point is that, if we do it by, (3/5i + 4/5j) * 20 to get velocity vector, isn't this the wrong method?

 

[Suchal Riaz]

Yeah, that I know that the magnitude is equal to the magnitude of the velocity vector.
BUT, my point is that, if we do it by, (3/5i + 4/5j) * 20 to get velocity vector, isn't this the wrong method?

the magnitude of the vector u get after multiplication wont be 20. the magnitude of the vector should be 20 not multiplied by 20. for that multiply by 20 and divide by magnitude of the vector already given.
if the vector which actually not unit vector as it's magnitude is not 1.

otherway of thinking this is that first convert the vector into unit vector then multiply by 20. same result.

 

[Saad Mughal]

the magnitude of the vector u get after multiplication wont be 20. the magnitude of the vector should be 20 not multiplied by 20. for that multiply by 20 and divide by magnitude of the vector already given.
if the vector which actually not unit vector as it's magnitude is not 1.

otherway of thinking this is that first convert the vector into unit vector then multiply by 20. same result.

That's what I did. The direction thing is so much more sensible.

 

[Suchal Riaz]

That's what I did. The direction thing is so much more sensible.

if u did like that then ur answer should be correct. i dont remember the question exactly so i cant confirm.

 

[Saad Mughal]

if u did like that then ur answer should be correct. i dont remember the question exactly so i cant confirm.

I know. The answer is correct in both ways.

 

[KWIKIW]

How was the binomial qsuestion in the add maths paper?

 

[Suchal Riaz]

I know. The answer is correct in both ways.

Shukr he tum ne dp to change ki

 

[Saad Mughal]

Shukr he tum ne dp to change ki

Haan. Ab khayal aya mujhy.

 

[KWIKIW]

Can any one give me any flowchart symbols?

 

[mohdumar]

Haan. Ab khayal aya mujhy.

Saad did u make any mistake, my whole was 100% distinction until i came to know about a silly mstk costing me 2 marks

 

[Suchal Riaz]

Saad did u make any mistake, my whole was 100% distinction until i came to know about a silly mstk costing me 2 marks

i dont know what i did

 

[Saad Mughal]

Saad did u make any mistake, my whole was 100% distinction until i came to know about a silly mstk costing me 2 marks

Not yet. ALHUMDULILLAH. There was just one thing. I gave a certain answer to 2 sig fig. rather than 3 sig. fig.

 

[mohdumar]

Not yet. ALHUMDULILLAH. There was just one thing. I gave a certain answer to 2 sig fig. rather than 3 sig. fig.

OOO ooooo.

 

[Saad Mughal]

OOO ooooo.

Is that a problem?

 

[mohdumar]

Is that a problem?

Dont really know what cie examiners do here. But I always used to miss 180/180 and 160/160 in school due to this S.F. shit. U reminded me of that.

 

[Saad Mughal]

Dont really know what cie examiners do here. But I always used to miss 180/180 and 160/160 in school due to this S.F. shit. U reminded me of that.

....
The value was not exactly begging to be rounded off.

 

[mohdumar]

....
The value was not exactly begging to be rounded off.

which one was it?

 

[spongebob123]

what was the answer to the last question (kinematics)?

 

[spongebob123]

Dont really know what cie examiners do here. But I always used to miss 180/180 and 160/160 in school due to this S.F. shit. U reminded me of that.

what are you? 160/160???

 

[mohdumar]

what are you? 160/160???

yeah well addmaths is sooo easy. Today I am sure to get 78/80. I spent an hour reverse checking all my answers.