Mathematics: Post your doubts here!

[eliyeap]

someone tell me how to write equation of plane in the form 3x+2y-3z+1=0 to the form r.n=a.n

Take r as (x,y,z) and multiply with your normal

 

[Georgtchernev45]

can anyone do questions 5 part ii) and 6 ii) from the Oct/Nov 2014 paper 32

 

[Wâlèé Atèéq]

Need Help..?

 

[musiclover gurl]

As level ?
View attachment 57252

Once again, sorry for the late reply, was really busy with revision. Uhmm, the first two part of the question is a bit blurry. Could u just type it again...? Please?
Ya, AS level

 

[The Sarcastic Retard]

Once again, sorry for the late reply, was really busy with revision. Uhmm, the first two part of the question is a bit blurry. Could u just type it again...? Please?
Ya, AS level

(i) OB = 6 cm
AO = 6 cm
AB = sqrt(36 + 36)
AB = 6sqrt(2)

(ii) tan^-1 (6/6) = pi/4

 

[musiclover gurl]

(i) OB = 6 cm
AO = 6 cm
AB = sqrt(36 + 36)
AB = 6sqrt(2)

(ii) tan^-1 (6/6) = pi/4

Thanks a lot!

 

[lemonrsiow]

A die is biased. The mean and variance of a random sample of 70 scores on this die are found to be 3.61 and 2.70 respectively. Calculate a 95% confidence interval for the population mean score.

http://maxpapers.com/syllabus-materials/mathematics-9709-a-level/attachment/9709_s14_qp_71/
http://maxpapers.com/syllabus-materials/mathematics-9709-a-level/attachment/9709_s14_ms_71/

Can anyone explain why you do 70/69 × 2.70 = 2.73913?
Thanks.

 

[Wolfgangs]

A ball is kicked with an initial speed v0=10 m/s at an angle of θ= 37◦above the horizontal. Its speed in m/s at maximum height is:

 

[Wolfgangs]

Ali pushes a block by applying a force of F = -10i + 10j in units of newtons. What is the direction of this force (the angle of the vector with the +x direction)?

 

[Wolfgangs]

Ali pushes a block by applying a force of F = -10i + 10j in units of newtons. What is the direction of this force (the angle of the vector with the +x direction)?

Someone please reply as soon as possible

 

[Farheen1201]

A ball is kicked with an initial speed v0=10 m/s at an angle of θ= 37◦above the horizontal. Its speed in m/s at maximum height is:

10cos(37) = 7.98 m/s

Ali pushes a block by applying a force of F = -10i + 10j in units of newtons. What is the direction of this force (the angle of the vector with the +x direction)?

I am guessing its 45

 

[nehaoscar]

Any revision notes for P3 and S1?
Thanks in advance

 

[nehaoscar]

Help! How to do part i and part b??

 

[Sarosh Jameel]

HELP WITH PART a

 

[nehaoscar]

View attachment 57307

HELP WITH PART a

tan^2(2x) = 1 + sec^2(2x)
Substitute this to get
integrate : 5 + sec^2(2x)
this gives 5x + tan2x
simplify tan2x

 

[Sarosh Jameel]

tan^2(2x) = 1 + sec^2(2x)
Substitute this to get
integrate : 5 + sec^2(2x)
this gives 5x + tan2x
simplify tan2x

IN step 1 .. it should be -1 according to the formula ????

 

[nehaoscar]

IN step 1 .. it should be -1 according to the formula ????

Ohh yes it would be -1

 

[Sarosh Jameel]

View attachment 57295
Help! How to do part i and part b??

can u tell me the paper year ?

 

[nehaoscar]

can u tell me the paper year ?

S15 p21

 

[Sarosh Jameel]

View attachment 57295
Help! How to do part i and part b??

part (I) .. first simplify 2cosec2x into 2/sin2x . simply tan x into sinx/cosx ... simply it u will the answer
part (II) .. 2cosec2x tanx = sec^2x . then 2cosec4xtan2x = sec^2 2x ... integrate sec^2 2x and put the limits .. u will get require answer