# Core 4

• Created by: Ellie
• Created on: 15-06-15 21:22
What is the binomial expansion of (1+x)^n?
1+nx+n(n-1)x^2
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How do you do partial fractions of 1/(x+3)(x^2-4)
A/(X+3)+Bx+c/(x^2-4)
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How do you do partial fractions of 1/(x-1)(x+2)^2
A/(x-1)+B/(x+2)+C/(x+2)^2
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What does cotx =?
cosx/sinx
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What does cos^2x=?
1-sin^2x
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What does sec^2x =?
tan^2x+1
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What does cosec^2x =?
1+cot^2x
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What does v=?
pi times the integral of y^2
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What does sin2x =?
2sinxcosx
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What does cos2x=?
cos^2x-sin^2x or 2cos^2x-1 or 1-2sin^2x
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What does tan2x =?
2tanx/ 1-tan^2x
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How do you find the angle between two planes?
work out the angle between two normals
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## Other cards in this set

### Card 2

#### Front

How do you do partial fractions of 1/(x+3)(x^2-4)

#### Back

A/(X+3)+Bx+c/(x^2-4)

### Card 3

#### Front

How do you do partial fractions of 1/(x-1)(x+2)^2

### Card 4

#### Front

What does cotx =?

### Card 5

#### Front

What does cos^2x=?