- Messages
- 42
- Reaction score
- 17
- Points
- 8
yesWait, what?
You're saying it was tan^-1(x) = -7?
Doesn't that make it x = tan(-7)
?
We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
Click here to Donate Now (View Announcement)
yesWait, what?
You're saying it was tan^-1(x) = -7?
Doesn't that make it x = tan(-7)
?
So then which one was correct?
foR ALL WHO GOT THE K VALUE AS 6 3 AND -23
FOR POINT OF REFLECTION
ANY EXPAINATION?
ohh sry, i meant tan x = -7Wait, what?
You're saying it was tan^-1(x) = -7?
Doesn't that make it x = tan(-7)
?
Well, the coefficient I got was 40.hey guys for the binomial question second part was the answer 104 or something like that?
In Sha Allah.
The battle of M1 still remains to be fought.
I did everything except the last part and wrote R as (3,9). How many marks do you think I'll get?The question gives point R (-1.3) and line of 3y + 2x = 33 as the mirror. We are looking for the image of R, (let's name it as P)
Rearranging the equation of the mirror gives us y = -2x/3 + 11
Therefore gradient (m) of mirror is -2/3.
Since we understand that the line PR will be PERPENDICULAR to mirror (properties of reflection), therefore m of PR = 1.5.
Work out the equation of PR from the point (-1,3) and m of 1.5
y - 3 = 1.5 (x+1)
y = 1.5 x + 4.5
Another properties of mirror is that distance from object to mirror = distance from image to mirror. Therefore point of intersection of line PR and the mirror will be the MIDPOINT for line PR.
Working out simultaneous equation on PR and mirror,
y = 1.5 x + 4.5
y = -2x/3 + 11
1.5 x + 4.5 = -2x/3 + 11
9x + 27 = -4x + 66
13x = 39
x = 3
Subs x = 3 to any of the 2 equation above, we will get y = 9
Since we know R, and the midpoint, we can work out P.
(-1 + x)/2 = 3 for the x-coordinate and (3+y)/2 = 9 for the y-coordinate
Therefore x = 7 and y = 15
almost every1 in my centre wrote that except for only one of my big nerd fellowi wrote x<=25 as well...
it is not -2.5<=x<=0 it is -2.5<=x<0. X cannot be zerobcz its -2.5<=x<=0
thnks for correcting!it is not -2.5<=x<=0 it is -2.5<=x<0. X cannot be zero
anyways i did it wrong by omitting the zero inequality
if that is right then if it wasnt for the Q7 i would have achieved 72 darn it :/it is not -2.5<=x<=0 it is -2.5<=x<0. X cannot be zero
anyways i did it wrong by omitting the zero inequality
You seem pretty sure about your grades.if that is right then if it wasnt for the Q7 i would have achieved 72 darn it :/
You seem pretty sure about your grades.
For almost 10 years, the site XtremePapers has been trying very hard to serve its users.
However, we are now struggling to cover its operational costs due to unforeseen circumstances. If we helped you in any way, kindly contribute and be the part of this effort. No act of kindness, no matter how small, is ever wasted.
Click here to Donate Now