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MATHS P12

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So this is what i remember
Q. prove that cosx/tanx(1-sinx) = 1 +1/sinx
Q.fx= 3-4cos^k x
(a)when k=2...state the range of fx...my ans was -1<f<3
i dont remember its b part
(ii) when k=1
(a) sketch the graph


Q:A circle is divided into sectors..in a way that there anglees form A.P...
the angle of largest sector is four times greater than the smallest one....radius is 5 cm....what is the perimeter of smallest sector
.....My answer...angle of smallest one is 24...p=12.1
 
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ks136 said:
So this is what i remember
Q. prove that cosx/tanx(1-sinx) = 1 +1/sinx
Q.fx= 3-4cos^k x
(a)when k=2...state the range of fx...my ans was -1<f<3
i dont remember its b part
(ii) when k=1
(a) sketch the graph


Q:A circle is divided into sectors..in a way that there anglees form A.P...
the angle of largest sector is four times greater than the smallest one....radius is 5 cm....what is the perimeter of smallest sector
.....My answer...angle of smallest one is 24...p=12.1

range was -1<f(x)<7
Q b was to solve the equation:)
 
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farhan29 said:
ks136 said:
So this is what i remember
Q. prove that cosx/tanx(1-sinx) = 1 +1/sinx
Q.fx= 3-4cos^k x
(a)when k=2...state the range of fx...my ans was -1<f<3
i dont remember its b part
(ii) when k=1
(a) sketch the graph


Q:A circle is divided into sectors..in a way that there anglees form A.P...
the angle of largest sector is four times greater than the smallest one....radius is 5 cm....what is the perimeter of smallest sector
.....My answer...angle of smallest one is 24...p=12.1

range was -1<f(x)<7
Q b was to solve the equation:)


NO....WE DISCUSSED THIS YESTERDAY....IT WAS -1 TO 3....U DID IT WRONG....
 
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AND for the question in which it asked for what angle does the tangent makes with the x axis ...my ans was71.6 degrees
 
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Yes!!! All my answers are matching: 24 degrees smallest sector angle, 12.1 cm perimeter, 71.6 degrees tangent angle, -1 <= f(x) <= 3 range.

But does anyone know what the vector OD was?
 
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ok..maybe. But in dhaka almost everyone got -1<f(x)<7 since de least value of 4cos^2x is -4 so 3-(-4) = 7 which is de max value ..thats how i did it and most of my friends did:) maybe we are wrong ..you would know better:)
 
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sniper7137 said:
Yes!!! All my answers are matching: 24 degrees smallest sector angle, 12.1 cm perimeter, 71.6 degrees tangent angle, -1 <= f(x) <= 3 range.

But does anyone know what the vector OD was?
it was (8i+1J+8k)
 
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sniper7137 said:
Yes!!! All my answers are matching: 24 degrees smallest sector angle, 12.1 cm perimeter, 71.6 degrees tangent angle, -1 <= f(x) <= 3 range.

But does anyone know what the vector OD was?
sorry
 
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farhan29 said:
sniper7137 said:
Yes!!! All my answers are matching: 24 degrees smallest sector angle, 12.1 cm perimeter, 71.6 degrees tangent angle, -1 <= f(x) <= 3 range.

But does anyone know what the vector OD was?
it was (8i+1J+8k)

right..i remember now....
 
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mashallah paper went very gud...........
Range was -1<f(x)<3 and angle of tange with x axis was 71.6 degrees..............volume in the last question was 136.5pi..........
perimeter in the q10 was 12.09 ....................and the smallest angle was 24 degre.........
value of p and q in q2 were -2 and -15
and vector was achieved by the vector move method i dont remeber the exact cordinates but it sumething involving 8 and 1 ...............
 
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intel1993 said:
mashallah paper went very gud...........
Range was -1<f(x)<3 and angle of tange with x axis was 71.6 degrees..............volume in the last question was 136.5pi..........
perimeter in the q10 was 12.09 ....................and the smallest angle was 24 degre.........
value of p and q in q2 were -2 and -15
and vector was achieved by the vector move method i dont remeber the exact cordinates but it sumething involving 8 and 1 ...............

right... my all answers match :)
 
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Yes Yes Yes :Bravo: :Bravo: :Bravo: Those are the exact coordinates of OD vector (8i + 1j + 8k). And the logic behind it was absurdly simple now that i think of it.
 
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sniper7137 said:
Yes Yes Yes :Bravo: :Bravo: :Bravo: Those are the exact coordinates of OD vector (8i + 1j + 8k). And the logic behind it was absurdly simple now that i think of it.
how did u attempted dat???
 
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these r my answers anyone having contradiction please discusss
thnx
 

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HEY I THINK MINE R SAME.........I THINK THAT U MIGHT GET FULL MARKS....I DIDNT INCLUDED C in 1st Q...How many marks will be deducted?
 
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