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hint

1

area of circle

pie r squared

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2

circle circumference

pie diameter

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3

equation of circle

x² + y² = r²

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4

equation of line

y = mx + c

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5

direct proportion

y = kx

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6

indirect proportion

y = k/x

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7

volume of a cone

1/3 pie r² h

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8

SA of curved cone

pie r L

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9

area of triangle

½ b h

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10

n.o of sides

(n-2) x 180

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11

density =

mass / volume

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12

sin rule

A / sin A = B / sinB = C / sinC

or

sin A / A = sinB / B = sinC / C

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13

cos rule

cosA = b² + c² - a² / 2bc

or

a² = b² + c² - 2bcCosA

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14

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