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Created by
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Cards (13)
el normal es
perpendicular
asi que tiene un
negative reciprocal
gradient
a quadratic equation has
no
solution if
discriminant
b^2-4ac<0
inequality
sign changes when
multiplying
or dividing by a negative number
an equation is a function if each x value has only one y value (
one-to-one
,
many-to-one
)
angle of a sector in radians
arc length
/
radius
= angle
area of a sector in radians
1/2
x
r^2
x
angle
double angle formula
sin2x
= 2sin(x)
cos(x)
cos(2x)
=
cos^2x
-
sin^2x
= 1-
2sin^2x
=
2cos^2x
-1
tan
(2x) = 2tanx/1-tan^2x
tan^2(x)
+ 1 =
sec^2(x)
1 +
cot^2(x)
=
cosec^2(x)
cot(x)
=
cos(x)
/
sin(x)
sin (a +-b) = sinAcosB +- sinBcosA
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