maths p32 answers

[smzimran]

I have the exam paper infront of me right now, it says 0 < x < pi

So two stationary points:

cos is positive in first and fourth !
fourth is out of range
So one stationary point in 1st quadrant

Second of cos-1(0)

 

[Gooners]

I have the exam paper infront of me right now, it says 0 < x < pi

Yar please quote Q1 pls! Thnks

 

[beststriker]

i guess u solved it wrong though u removed log correctly
u vl get a mar for this =P

The ques was ln(3x+4)=2ln(x+1) and ans was x=2.30.

 

[Prisonbreak94]

Yar please quote Q1 pls! Thnks

ln(3x+4) = 2ln(x+1) solve

 

[Gooners]

ln(3x+4) = 2ln(x+1) solve

Yesss!! Tht is wat I was saying!!! Someone quotes above

Ln(x-1) = 2 ln(x+1)
Lol

 

[beststriker]

Expand sqrt 1-x / 1+x in ascending powers of x up to and including term in x^2

i got the ans= 1-x+1/4x^2

 

[sparten]

So two stationary points:

cos is positive in first and fourth !
fourth is out of range
So one stationary point in 1st quadrant

Second of cos-1(0)

bro u are screwed at the and u were getting 2x
u had to change range like 0<2x<2pie
the two answers were 30 and 150
u had to divide them by two
the final answer was 15 and 75
p.s i dnt rember ans in radians!

 

[smzimran]

bro u are screwed at the and u were getting 2x
u had to change range like 0<2x<2pie
the two answers were 30 and 150
u had to divide them by two
the final answer was 15 and 75
p.s i dnt rember ans in radians!

I dont think mine was wrong i verified it but Allah know what is right,
So forget it

 

[Prisonbreak94]

i got the ans= 1-x+1/4x^2

I got 1-x+1/2x^2 and I'm pretty sure it's correct. I will have all the correct answers in about 2 hours though

 

[Gooners]

L

nono he copied the question worng!!! it was x+3 not 1

Lol it was not (x+3)

It was
Ln(3x+4) = 2ln(x+1)

 

[Saiyan]

an
and wat was ur volume?

pie/4(e2-1)

 

[Prisonbreak94]

Hey guys, here are some of the answers my tutor got. Please remember that even a math tutor could make a mistake, so the answers below may not be 100% correct. Good luck to all of us!

1. x=2.3
2.ii. The root is 1.32
3. 1 - x + (1/2)x^2
4. pi/2, 7pi/6 ---Note: not 100% sure about this one because we did it really fast, since I didn't solve it completely
5. expression for differential is -y=ln[(-1/2)e^2x+(3/2)] -> y= -ln[-1/2 e^2x + 3/2]
6. i. angles are pi/2, pi/12 and 5pi/12 (3 angles)
ii. the point is a maximum point
7. u = -1/2+1/2i
8. ---
9. i.equation of tangent is y= x-1
ii. pi[(1/4)-(e^2/4)]
10. ii. position vector for point of intersection is 5,3,3
we did not solve the last part with the distance for the vector because I didn't attempt the question.

 

[aaditya menon]

Hey guys, here are some of the answers my tutor got. Please remember that even a math tutor could make a mistake, so the answers below may not be 100% correct. Good luck to all of us!

1. x=2.3
2.ii. The root is 1.32
3. 1 - x + (1/2)x^2
4. pi/2, 7pi/6 ---Note: not 100% sure about this one because we did it really fast, since I didn't solve it completely
5. expression for differential is -y=ln[(-1/2)e^2x+(3/2)] -> y= -ln[-1/2 e^2x + 3/2]
6. i. angles are pi/2, pi/12 and 5pi/12 (3 angles)
ii. the point is a maximum point
7. u = -1/2+1/2i
8. ---
9. i.equation of tangent is y= x-1
ii. pi[(1/4)-(e^2/4)]
10. ii. position vector for point of intersection is 5,3,3
we did not solve the last part with the distance for the vector because I didn't attempt the question.

Well most of it seems correct. I'm not sure which one is the answer for the trigo question, the csc 2theta = sec theta + cot theta? And what about question 8? What was the question/answer?

Dude, do you remember all the questions? If so, could you post them here? The questions not the answers, would really appreciate it man

 

[Prisonbreak94]

Well most of it seems correct. I'm not sure which one is the answer for the trigo question, the csc 2theta = sec theta + cot theta?

Dude, do you remember all the questions? If so, could you post them here? The questions not the answers, would really appreciate it man

I got a copy of the paper from my exam centre, so I have it with me. I can either email you the exam paper OR tell you the questions via PM if you wish. The cosec2theta question is number 4 btw

 

[aaditya menon]

I got a copy of the paper from my exam centre, so I have it with me. I can either email you the exam paper OR tell you the questions via PM if you wish. The cosec2theta question is number 4 btw

That'd be great, I've posted on your wall/news feed, my email id is there too. It'd be great if you can send me a copy. Thanks a ton man, really appreciate this

 

[umer altaf]

can anyone tell me what was q's 4 and 6

 

[Prisonbreak94]

Please do so. The 24 hour is over. My email address is [email protected]. It will really be kind of you if you do so.

Sent.

 

[aaditya menon]

Hey guys, here are some of the answers my tutor got. Please remember that even a math tutor could make a mistake, so the answers below may not be 100% correct. Good luck to all of us!

1. x=2.3
2.ii. The root is 1.32
3. 1 - x + (1/2)x^2
4. pi/2, 7pi/6 ---Note: not 100% sure about this one because we did it really fast, since I didn't solve it completely
5. expression for differential is -y=ln[(-1/2)e^2x+(3/2)] -> y= -ln[-1/2 e^2x + 3/2]
6. i. angles are pi/2, pi/12 and 5pi/12 (3 angles)
ii. the point is a maximum point
7. u = -1/2+1/2i
8. ---
9. i.equation of tangent is y= x-1
ii. pi[(1/4)-(e^2/4)]
10. ii. position vector for point of intersection is 5,3,3
we did not solve the last part with the distance for the vector because I didn't attempt the question.

Question 4)

The answers are : 201.47 degrees and 338.53 degrees.

Question 6) Only 2 angles, pi/12 and 5pi/12. pi/2 cannot be an answer as csc pi is undefined.

I'll try and find the second point of Q10 too.

 

[aaditya menon]

Question 10) The two points are (7,4,5) and (3,2,1). Distance between them = 6.

 

[aaditya menon]

Answer 1) 2.30
Answer 2) 1.32
Answer 3) 1 - x + 0.5x^2
Answer 4) 201.47 degrees and 338.53 degrees.
Answer 5) y = ln (2/(3-e^(2x)))
Answer 6) pi/12 and 5pi/12 , maximum point
Answer 7) -0.5 + 0.5i
Answer 8) Pretty easy, if someone wants the working, i'll be more than happy to post it here.
Answer 9) y = x-1 and pi/4(e^2 -1)
Answer 10)The two points are (7,4,5) and (3,2,1). Distance between them = 6.