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    (Original post by ilovereading)
    I DONT HAVE A SPARE CALCULATOR :afraid::bawling:
    And... I'm going to school like 20 minutes earlier to buy another one because I'm panicking

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    CAN ANYONE TELL ME WHEN YOU USE THE rtheta equation or the other arc lengtH equation...there are two formulas for arc length right? I don't know how to use the second one and when you use it, HELP!!!! AND WHAT IS THE FORMULA FOR IT???
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    (Original post by frances98)
    And... I'm going to school like 20 minutes earlier to buy another one because I'm panicking

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    What's wrong with your current one?

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    (Original post by Sam_the-man)
    Thanks man
    Area of segment =
    1/2*r^2*(theta -sintheta)

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    (Original post by Olon)
    CAN ANYONE TELL ME WHEN YOU USE THE rtheta equation or the other arc lengtH equation...there are two formulas for arc length right? I don't know how to use the second one and when you use it, HELP!!!! AND WHAT IS THE FORMULA FOR IT???
    I DIDNT KNOW THERE WAS A SECOND FORMULA¿!?!??

    I'm pretty sure its just rtheta to find the arc length...just one formula? I thought there was just the one.

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    (Original post by Columbo97)
    Considering people have been requesting a thread.

    Edexcel C2 - Wednesday 20th May 2015

    Hopefully this thread will motivate us all, and help us to achieve the grades we deserve.

    Useful Links
    Specification - http://qualifications.pearson.com/co...hs_Issue_3.pdf
    Formula Booklet - http://www.edexcel.com/migrationdocu...cal-Tables.pdf
    Offical Past Papers - http://www.mathspapers.co.uk/edexcel.html

    Examsolutions - www.examsolutions.net
    Maths247 - www.m4ths.com
    Question Booklets/Past Papers - http://www.madasmaths.com

    If you have any other websites you'd like to add, post them below and I'll edit this post.
    The specification wont work for me dk y
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    (Original post by physicsmaths)
    If they say find the area yes give the abosolute answer. If they evaluate the integral blah then give whatever cones out of the integral. Remember peopke that the calc can check ur answers!!


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    ok so ALL area questions are absolute value. thanks
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    (Original post by Olon)
    CAN ANYONE TELL ME WHEN YOU USE THE rtheta equation or the other arc lengtH equation...there are two formulas for arc length right? I don't know how to use the second one and when you use it, HELP!!!! AND WHAT IS THE FORMULA FOR IT???
    When you have the radius of a circle and angle IN RADIANS

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    and my calculator can'#t do differentiation. so ill hvae to freestyle things
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    (Original post by dripper)
    and my calculator can'#t do differentiation. so ill hvae to freestyle things
    Cacylators that do diff are not allowed.
    Thats wjat i was told

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    (Original post by Olon)
    CAN ANYONE TELL ME WHEN YOU USE THE rtheta equation or the other arc lengtH equation...there are two formulas for arc length right? I don't know how to use the second one and when you use it, HELP!!!! AND WHAT IS THE FORMULA FOR IT???
    You have L = r*Theta
    Area of sector = 0.5*r^2*Theta
    Area of segment = 0.5*r^2(Theta-sin(Theta)
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    (Original post by Olon)
    CAN ANYONE TELL ME WHEN YOU USE THE rtheta equation or the other arc lengtH equation...there are two formulas for arc length right? I don't know how to use the second one and when you use it, HELP!!!! AND WHAT IS THE FORMULA FOR IT???
    There's another formula if the angle is in degrees, but they like to test your radians ability in C2, and I've never seen it be given in degrees, so you should be find to just know the radians equation
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    (Original post by a.a.k)
    When you have the radius of a circle and angle IN RADIANS

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    Noooo, i mean when do you use r(2theta-angle)
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    I really hope its not gonna be the R paper I feel like im ready for this exam but then i dont want to do it
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    (Original post by Olon)
    r(2theta-angle)

    What is that
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    (Original post by frances98)
    And... I'm going to school like 20 minutes earlier to buy another one because I'm panicking

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    OUR SCHOOL DOESNT SELL CALCULATORS AND I DONT HAVE TIME TO GO TO STAPLES TO GET ONE AHHHHHHh
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    (Original post by Olon)
    Noooo, i mean when do you use r(2theta-angle)
    area of a sector = A x 1/2 x r^2 (thera - sin(thera) *i think*
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    (Original post by VyteJan)
    area of a sector
    Area of sector is 1/2*r^2*theta

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    when finding area between a line and a curve is it better to make a shape and substract them or intergrate them by taking the lines away? hope that makes sense
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    (Original post by a.a.k)
    Area of sector is 1/2*r^2*theta

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    Yea, thats what i meant x'D thx
 
 
 
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