Mathematics: Post your doubts here!

[Rutzaba]

see this http://s1275.photobucket.com/user/Rutzaba/media/mathies_zpsf8d7677a.png.html

 

[Rutzaba]

Thanks. For 'Q6' how to do the second sub-part, http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s07_qp_1.pdf

y dun u refer to the answer paper ?

 

[biscuitbiscuit]

y dun u refer to the answer paper ?

Its okay if u got tired of answering

 

[Rutzaba]

Its okay if u got tired of answering

nah sweety its not that. if u r getting the concept u shud be able to solve it urself na?
thats how u learn

 

[biscuitbiscuit]

after you find out the equation of BC which turns out to be 3y+2x=20, substitute y=0 for C. So the coordinates are C(10,0). To find D, we know that AB is parallel to CD. So count the number of steps (i.e from A-B, the x-coordinate moves from -2 to 2, and y-coordinate from 8 to 14. So similarly, we move 4 units right and 6 units up from C to D) Voila!.... D(14, 6)

Thanks

 

[biscuitbiscuit]

nah sweety its not that. if u r getting the concept u shud be able to solve it urself na?
thats how u learn

Its easy in the book but when it comes to past papers I am blank

 

[saadgujjar]

3cos(2x-Y)+4sin(2x-Y)=2
find x 0 to 2pi
Y is theta

 

[Rutzaba]

Its easy in the book but when it comes to past papers I am blank

it shudnt be like that buddy. thses questions are quiet simple

 

[Rutzaba]

3cos(2x-Y)+4sin(2x-Y)=2
find x 0 to 2pi
Y is theta

do this by using the opening formulas for sin( alpha- theta)
and cos(alpha- theta)

 

[saadgujjar]

do this by using the opening formulas for sin( alpha- theta)
and cos(alpha- theta)

plz solve..

 

[ahmed abdulla]

Hello .. can u help me with this ...
Show that ,
integral of tan2x =1/2 Insec2x + c

i am not that good in integration ... every time we perform a new thing ! .. is there a specific formula which applies to all integrations .. help

 

[Rutzaba]

plz solve..

have to integrate this?

 

[DumbIdiot]

3cos(2x-Y)+4sin(2x-Y)=2
find x 0 to 2pi
Y is theta

here`re the values of 2x-Y : -0.232, 2.09, 6.05

 

[ahmed abdulla]

integrate cos^2(x)

 

[DumbIdiot]

Hello .. can u help me with this ...
Show that ,
integral of tan2x =1/2 Insec2x + c

i am not that good in integration ... every time we perform a new thing ! .. is there a specific formula which applies to all integrations .. help

tan2x = sin2x/cos2x
integration of sin2x/cos2x = -0.5(ln(cos2x)+c = o.5ln(cos2x)^-1 +c = 0.5ln(sec2x) +c

integrate cos^2(x)

use the double angle formula for this one
cos^2(x) = (cos2x+1)/2

 

[Lama AN]

question 2 - Nov 2004 - mechanics 1 ( paper 4)

i found out (i) so easily . but can anyone explain for me part (ii) ?

 

[saadgujjar]

here`re the values of 2x-Y : -0.232, 2.09, 6.05

tell me procedure..

 

[saadgujjar]

here`re the values of 2x-Y : -0.232, 2.09, 6.05

tell me procedure..

 

[ahmed abdulla]

tan2x = sin2x/cos2x
integration of sin2x/cos2x = -0.5(ln(cos2x)+c = o.5ln(cos2x)^-1 +c = 0.5ln(sec2x) +c



use the double angle formula for this one
cos^2(x) = (cos2x+1)/2

can u ( plz ) post some of the formulas ... because i first time hear of double angle formula ! >> formulas which are not inside the book

 

[ahmed abdulla]

tan2x = sin2x/cos2x
integration of sin2x/cos2x = -0.5(ln(cos2x)+c = o.5ln(cos2x)^-1 +c = 0.5ln(sec2x) +c



use the double angle formula for this one
cos^2(x) = (cos2x+1)/2

can u ( plz ) post some of the formulas ... because i first time hear of double angle formula ! >> formulas which are not inside the book