Turn on thread page Beta
    Offline

    16
    ReputationRep:
    (Original post by The Q maestro)
    How you find area of an equilateral triangle

    Base times height /2 :hmmm:

    And also 0.5ab sinc
    Posted from TSR Mobile
    nah it's square root 3/4a^2 (a being length of equal sides)
    Offline

    1
    ReputationRep:
    (Original post by ToLiveInADream)
    nah it's square root 3/4a^2 (a being length of equal sides)
    Why cant you just cut the triangle into half and then find the area of each right angle using b*h/2

    What about a square-based pyramid

    You can find the surface area for the base easily, but how you find surface area for the three trianglular faces :hmmm:

    Posted from TSR Mobile
    Offline

    2
    ReputationRep:
    can someone send me the equations needed to know for optimisation please
    Offline

    2
    ReputationRep:
    I uderstand this but when calculation the area of the sector the equation is

    A= ½ × r2 x (θ - sin θ) However when calculating it in the question they use ½ ×r2 x (sin θ)

    I am confused on this.
    Offline

    2
    ReputationRep:
    How many decimal places must you give answers to? Or Significant figures?


    And can you give answers in fractions
    Offline

    1
    ReputationRep:
    (Original post by MATTTT)
    I uderstand this but when calculation the area of the sector the equation is

    A= ½ × r2 x (θ - sin θ) However when calculating it in the question they use ½ ×r2 x (sin θ)

    I am confused on this.
    .5r^2 sin(theta) is probably the area of the triangle in a sector of a circle. Your Q may have referred like that.
    Offline

    3
    ReputationRep:
    (Original post by dripper)
    How many decimal places must you give answers to? Or Significant figures?


    And can you give answers in fractions
    It will be specified in the question otherwise anything (including fractions) is accepted
    Offline

    1
    ReputationRep:
    (Original post by MATTTT)
    I uderstand this but when calculation the area of the sector the equation is

    A= ½ × r2 x (θ - sin θ) However when calculating it in the question they use ½ ×r2 x (sin θ)

    I am confused on this.
    The first equation is for the area of a segment

    Posted from TSR Mobile
    Offline

    18
    ReputationRep:
    My exam is in 1 hour and a half (C12) :no::argh: Wish mee luck ..

    and good luck to everyone else..
    Offline

    3
    ReputationRep:
    Who else is taking 2 calculators into the C2 exam?
    Offline

    18
    ReputationRep:
    Can some one pleas explain this to meeName:  help.PNG
Views: 367
Size:  146.0 KB
    Offline

    1
    ReputationRep:
    Paper leaked?
    Offline

    0
    ReputationRep:
    Someone please tells every formula I need to know
    Offline

    16
    ReputationRep:
    (Original post by FluffyCherry)
    Can some one pleas explain this to meeName:  help.PNG
Views: 367
Size:  146.0 KB
    The last two bits? Try and draw right-angled triangles and you'll see it.

    Btw, part c requires cosine rule so find the length of some lines in order to do so
    Offline

    1
    ReputationRep:
    (Original post by FluffyCherry)
    Can some one pleas explain this to meeName:  help.PNG
Views: 367
Size:  146.0 KB
    I think the first part is C3 -implicit differentials? What paper is this from
    Offline

    1
    ReputationRep:
    (Original post by ToLiveInADream)
    The last two bits? Try and draw right-angled triangles and you'll see it.

    Btw, part c requires cosine rule so find the length of some lines in order to do so
    Nah you just can straightaway get the angle using the coordinates and arctan em.
    Offline

    18
    ReputationRep:
    (Original post by Hsakbo)
    I think the first part is C3 -implicit differentials? What paper is this from
    I actually have no idea, I found it in a maths group.
    Offline

    18
    ReputationRep:
    (Original post by ToLiveInADream)
    The last two bits? Try and draw right-angled triangles and you'll see it.

    Btw, part c requires cosine rule so find the length of some lines in order to do so
    Thaanx
    Offline

    1
    ReputationRep:
    Last minute Q can anyone tell me when a curve is in both the y+ve and y-ve like: Name:  image.jpg
Views: 135
Size:  510.5 KB

    Would I have to worry if I'd get a nil area(0) when integrating the usual way?
    Offline

    1
    ReputationRep:
    (Original post by Kwaks)
    Who else is taking 2 calculators into the C2 exam?
    Lmao mee. One that can integrate and a normal one just in case.
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: May 15, 2017

978

students online now

800,000+

Exam discussions

Find your exam discussion here

Poll
Should predicted grades be removed from the uni application process

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.