ECAT and MCAT Preparation: Post your doubts here!

[Mustehssun Iqbal]

http://en.wikipedia.org/wiki/List_of_mathematical_symbols

 

[Mustehssun Iqbal]

http://en.wikipedia.org/wiki/List_of_mathematical_symbols

especially for Fs.c book readers...

 

[grumpy]

A car is moving at 40 m/s on a circular road of radius 400m. The speed of car is increasing at a rate of 4m/s. The resultant acceleration is? A- 5.22 m/s B- 5.66 m/s C- 5.33 m/s D- 5.84 m/s

whts the answer i got B

 

[hashigo]

this one is a rhyme in urdu...
moon pe g ki value fix hai,
moon pe g ki value fix hai,
earth ka 1 over 6 hai

Doesn't help me with my tests on 30th june n 8 july P

 

[Mustehssun Iqbal]

Doesn't help me with my tests on 30th june n 8 july P

although not a big tip, but it can help

 

[hashigo]

If Z1 = 1 + i and Z2 = 2 + 3i , then |Z2 - Z1| = ?

My answer is root 5
but the book says its (root 3) i

I dont get it, probably the book is wrong here...

The answer is (root3) i I think your supposing i^2 as +1 , where as it's -1

 

[HIMYM forever!!]

whts the answer i got B

Yes the answer is B. Could you please explain?

 

[Mustehssun Iqbal]

please solve this question;
Prove the identity
sin^4 theta + cos^4 theta = 1 - 3sin^2 theta. cos^2 theta...

 

[Goodfella]

What is the circular measure of the angle b/w the hands of a watch at 4 O'clock?

No other length is given

 

[Mustehssun Iqbal]

What is the circular measure of the angle b/w the hands of a watch at 4 O'clock?

No other length is given

120 degrees??

 

[Mustehssun Iqbal]

What is the circular measure of the angle b/w the hands of a watch at 4 O'clock?

No other length is given

2/3 pi??

 

[Mustehssun Iqbal]

What is the circular measure of the angle b/w the hands of a watch at 4 O'clock?

No other length is given

there are 12 divisions in a clock. The total angle is 360 degrees...
so 360/12 = 30 degrees -> 1 division of a clock...
in 4 o clock, there are 4 divisions of a clock....
so 4 * 30 = 120 degrees, or you can count 120 degrees too...
so... is the answer correct??

 

[Goodfella]

The answer is (root3) i I think your supposing i^2 as +1 , where as it's -1

he's taking the modulus, which can never be a negative number, nor could it be in terms of i

 

[Goodfella]

there are 12 divisions in a clock. The total angle is 360 degrees...
so 360/12 = 30 degrees -> 1 division of a clock...
in 4 o clock, there are 4 divisions of a clock....
so 4 * 30 = 120 degrees, or you can count 120 degrees too...
so... is the answer correct??

yes you're correct, it occured to me to solve this way, but i thought the question was related to the retarded fsc concept of sexagesimal measures of angles

 

[Goodfella]

Without using a table or calculator, find the values sin and cos for the following

i. 18
ii. 36
iii 54
iv 72

this isn't properly explained in fsc book :/

 

[1357913579]

please solve this question;
Prove the identity
sin^4 theta + cos^4 theta = 1 - 3sin^2 theta. cos^2 theta...

isnt the answer suppose to be 1-2sin^2 theta. cos^2 theta

 

[Mustehssun Iqbal]

isnt the answer suppose to be 1-2sin^2 theta. cos^2 theta

no... it's 1- 3sin^2 theta. cos^2 theta... close though...
thanks

 

[Mustehssun Iqbal]

What is a lower bound and an upper bound of a set??
Q) Let A be the set consisting of -10, -5, 8, -1/3, 15, 21.
Find;
a) an upper bound of A;
b) a lower bound of A...

 

[1357913579]

no... it's 1- 3sin^2 theta. cos^2 theta... close though...
thanks

 

[Mustehssun Iqbal]

excellent... i think your answer is right. there might be a misprint in the book!
Thanks a lot