sat math

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9 Terms

1
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special right triangles

(45=x,45=x,90=x(sqrt2)

(30=x,60=x(sqrt3),90=2x)

2
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triangle inequality rule

a+b>c

3
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rhombus area

trapezoid area

d1d2 / 2

h ( b1+b2 / 2 )

4
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parabola vertex

( -b / 2a , f(-b / 2a) )

5
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logarithim

log a (b) = c --> a^c = b

6
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cylinder surface area

sphere surface area

cone surface area

2πr² +2πrh

4πr²

πr²+πrl

7
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arc length

2πr ( x / 360 )

8
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sector area (circle)

πr² ( x / 360 )

9
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trig. fundamental identitiy

sin²(x)+cos²(x)=1

tan (x) = cos(x) / sin(x)​