# C2 Formula/Proof Revision

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• Created by: Georgina
• Created on: 07-04-14 15:37
logaM + logaN =
logaMN
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logaM-logaN=
loga(M/N)
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logaM(2)=
2logaM
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LogaA=
1
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loga1=
0
5 of 20
loga(1/m)=
-loga(m)
6 of 20
what is the sine rule?
a/sin() = b/sin() = c/sin()
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what is the cosine rule?
a(2) = b(2)+c(2) = 2bc(cosA)
8 of 20
logaX=
logbX/logbA
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Equation to find value of geometric series
U(n)= ar(n-1)
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Sum of geometric series
Sn=a(1-r(n))/1-r
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sum of infinity in geometric series
=a/1-r
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expand binomial series (a+bx)*2
2C0(a)*2(bx)*0 .... + 2C1(a)*1(bx) .....+2C2(a)*0(bx)*2
13 of 20
area of a triangle
1/2 absin(c)
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Equation of a circle
(x-a)*2+(y-b)*2=r*2
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principal value formula for sinx
x=(180-PV) +360n ......... x= PV+360n
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principal value formula for cosx
x=+/-PV+360n
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Principal value formula for tan x
x=PV+180n
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What is the factor theorem?
(x-3) therefore F(3) = ....
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what is remainder theorem?
long division to find remainder
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loga(M/N)

logaM-logaN=

2logaM

1

0