IGCSE MATHS Doubts

[haris94]

anytime 

[bulono]

another doubt M/J 2005 Q 2 c......

[bulono]

and in M/J 2005 Q 3 b how do i find the matrix....

[Shazizzzle]

Sin x = Perp. / Hyp. (Some People Have)
Cos x = Base/Hyp. (Curly Brown Hair)
Tan x = Perp./Base (Through Proper Brushing)

Some people have, curly brown hair, through proper brushing.

And the perpendicular (opposite) of ANY angle, is the side opposite of the angle.
That automatically makes the other side which is NOT the hyp. the base.
So, The Base and Perpendicular may be different for different angles in a right angled triangle

Then, Sine Rule.

Sin A     Sin B       Sin C
-----  = ------  = -------
  A           B            C

Then, Cosine rule.

a^2 = b^2 + c^2 - 2bc X Cos A
b^2 = a^2 + c^2 - 2ac X Cos B
c^2 = a^2 + b^2 - 2ab X Cos C

OR, if angle is needed,

Cos A = b^2 + c^2 - a^2 / 2bc (Note, the angle to be found is A. So on top, the last one being -sed will be a^2 - And the two being added above, will be the ones multiplying with 2 below)

[Vin]

help needed M/J 2004 question 2 c.....mine is 11 00 am GMT 3+

f(x) = x² - x - 3

g(x) = 6 - X³/3

x² - x - 3 = 6 - x³/3

x² - x - 3  = 18 - x³
                            ---------
                                3
3x² - 3x - 9 =  18 - x³

x³ + 3x² - 3x - 9 - 18 = 0

x³ + 3x² - 3x - 27 = 0

ii) find the intersection of these two graphs and write down the coordinates

..

[princess12]

can any 1 tell me please may 2004 p4 q2 part a(1) only
urgently reply fast please
 

[Vin]

Some people have, curly brown hair, through proper brushing.

LOL XD

[Shazizzzle]

Okay, I know what dependent events and independent events are, but where do we add and where do we multiply.

There is only one conclusion. There is no general hard-and-fast rule for probability. Sometimes you have to add, sometimes multiply, sometimes 1-(). It depends on the Question. And there is no explanation to why. So, basically, it's all screwed.

[Vin]

can any 1 tell me please may 2004 p4 q2 part a(1) only
urgently reply fast please
 

dont cry princess =P

f(x) = x² - x - 3
for p
=(-3)² -(- 3) - 3

= 9 + 3 - 3

=9

substitute " x " in f(x) try


..

[haris94]

can any 1 tell me please may 2004 p4 q2 part a(1) only
urgently reply fast please
 

p=(-3)²-(-3)-3=9+3-3=9

q=(1)²-(1)-3=1-1-3=-3

r=(4⁾²-(4)-3=16-4-3=9

[ksitna]

use tree diagrams?

[bulono]

@princess12 use the formula f(x)=x2-x-3 to find f(x) which is Y and use the x in the table......

[haris94]

suppose a sequence is
4, 12, 24, 40...........

how do u find the nth term?

[ksitna]

and in M/J 2005 Q 3 b how do i find the matrix....

well
u would use simultaneous equations
(ab)         the matrix of x = the matrix of q
(cd) times

[SoONa]

hello ,,it would be awsome  if anyone can show me the answer to october november 06 q 9 ..

thanks in advance .. wish every1 luck