1. CIE Oct/Nov 2018 session papers, marking schemes and other resources have been updated in our papers section.
    Furthermore, we have also updated resources for Edexcel, OCR, IB, TOEFL, SAT, GMAT and more.

    Click here for more information.

    Good luck with your exams.

    Dismiss Notice

Mathematics: Post your doubts here!

Discussion in 'International A And AS Level' started by XPFMember, Sep 8, 2011.

  1. Unknown202

    Unknown202

    Messages:
    79
    Likes Received:
    9
    Trophy Points:
    18
    Gender:
    Female
    so cuz the triangle is isoscles both angle are equal k thx alot:love:
     
    A***** likes this.
  2. XPC Bot

    Sponsored Listings
  3. Wâlèé Atèéq

    Wâlèé Atèéq

    Messages:
    314
    Likes Received:
    399
    Trophy Points:
    73
    Gender:
    Male
    Location:
    Karachi
    Can anyone help me? I'm in A2 and it's just 4 months left my subjects are Phy, Maths and C.S. Any hope ? :(
     
  4. A*****

    A*****

    Messages:
    817
    Likes Received:
    423
    Trophy Points:
    73
    Gender:
    Female
    Post the complete question
     
    EXPERTS likes this.
  5. Ebrahim12

    Ebrahim12

    Messages:
    57
    Likes Received:
    33
    Trophy Points:
    28
    Gender:
    Male
    (i)
    It being a one mark question is a hint at a clever solution:
    upload_2019-1-4_22-13-12.png
    (ii)
    From main diagram:
    AreaTotal = 2*AreaB + AreaCircle (or 2*AreaSemiCircle)

    AreaA = (i) - AreaB
     
    Last edited: Jan 4, 2019
  6. Ebrahim12

    Ebrahim12

    Messages:
    57
    Likes Received:
    33
    Trophy Points:
    28
    Gender:
    Male
    Was your answer to the first part y = 70e^[e^(-3t) - 1] ?

    As t goes to infinity,
    e^-3t tends to zero​
    thus,
    y tends to 70e^[0 - 1] = 70e^-1​

    so we have:
    yFinal = 70e^-1
    yStart = 70 (from main question)

    p = (yFinal/yStart)*100
    p = 100e^-1​
     
    Last edited: Jan 4, 2019
    A***** and EXPERTS like this.
  7. EXPERTS

    EXPERTS

    Messages:
    98
    Likes Received:
    885
    Trophy Points:
    103
    Gender:
    Male
    Location:
    some where
    upload_2019-1-5_9-24-22.png upload_2019-1-5_9-24-47.png
    help required !!!!!!! in part b
     
    Last edited: Jan 6, 2019
  8. A*****

    A*****

    Messages:
    817
    Likes Received:
    423
    Trophy Points:
    73
    Gender:
    Female
  9. A*****

    A*****

    Messages:
    817
    Likes Received:
    423
    Trophy Points:
    73
    Gender:
    Female
    Thanx alot!!
     
  10. A*****

    A*****

    Messages:
    817
    Likes Received:
    423
    Trophy Points:
    73
    Gender:
    Female
    IMG_20190106_013818.JPG

    How are the values of α and β calculated in the last part? Anyone plz help.....
     
  11. A*****

    A*****

    Messages:
    817
    Likes Received:
    423
    Trophy Points:
    73
    Gender:
    Female
    For b (i), AC is the diameter of the circle so APC will be the angle opposite to the diameter, i.e. angle in a semicircle=90°
    Or you can think of it by the other rule...ABCP is a quadrilateral with its vertices touching the circumference so opposite angles will be equal. Hence, angle APC=angle ABC

    In b (ii), angle APB is subtended by the chord AB, whereas angle BPC by the chord BC.Angles subtended by chords of equal length are equal and since AB=BC, the stated angles are equal.

    In b (iii) (a) APC=90 and APB and BPC are equal, so APB=90/2=45
    In b(iii) (b), angle CPD is also subtended by an equal chord so it will also equal angle APB i.e. 45. Hence, APD= 45+45+45=135

    For b(iv) see the diagram

    IMG_20190106_171552.JPG
    So angle PDC=90+8=98
     
  12. Ebrahim12

    Ebrahim12

    Messages:
    57
    Likes Received:
    33
    Trophy Points:
    28
    Gender:
    Male
    What are the answers? Is alpha = 1.23?
     
    EXPERTS likes this.
  13. A*****

    A*****

    Messages:
    817
    Likes Received:
    423
    Trophy Points:
    73
    Gender:
    Female
    That's 0.424
     
    EXPERTS likes this.
  14. Ebrahim12

    Ebrahim12

    Messages:
    57
    Likes Received:
    33
    Trophy Points:
    28
    Gender:
    Male
    This makes sense?
    upload_2019-1-6_21-26-15.jpeg
     
    A***** likes this.
  15. Lemniscates

    Lemniscates

    Messages:
    5
    Likes Received:
    2
    Trophy Points:
    3
    Depends on how well are you doing right now. You can inbox me for discussing about this topic.
     
  16. Lemniscates

    Lemniscates

    Messages:
    5
    Likes Received:
    2
    Trophy Points:
    3
  17. EXPERTS

    EXPERTS

    Messages:
    98
    Likes Received:
    885
    Trophy Points:
    103
    Gender:
    Male
    Location:
    some where
    upload_2019-1-9_8-4-33.png


    need help in part b and c
     
  18. Ebrahim12

    Ebrahim12

    Messages:
    57
    Likes Received:
    33
    Trophy Points:
    28
    Gender:
    Male
    b)
    Having two sides be the same makes it an isosceles triangle
    360 = 66 + 2x
    C)
    ADE and EFC are equal (alternate angles)
    ECF you already have
    FEC and AED are equal
     
    A***** likes this.
  19. A*****

    A*****

    Messages:
    817
    Likes Received:
    423
    Trophy Points:
    73
    Gender:
    Female
    Better to post in O level thread :)
     
    EXPERTS likes this.
  20. EXPERTS

    EXPERTS

    Messages:
    98
    Likes Received:
    885
    Trophy Points:
    103
    Gender:
    Male
    Location:
    some where
    dont be angry sis
     
  21. EXPERTS

    EXPERTS

    Messages:
    98
    Likes Received:
    885
    Trophy Points:
    103
    Gender:
    Male
    Location:
    some where
    thanks man
     

Share This Page