Topics 36-46 Flashcards
Pressure =
Force/Area
Density =
Mass/volume
Arc length
Angle/360 x PIEd
Area of sector
Angle/360 x PIEr^2
X to the power of 0
1
2 to the power of -3
3 to the power of -3
1/8
1/27
X to the power of 1/2
X to the power of 1/4
Square root of x
Fourth root of x
X to the power of m/n
N root X to the power of m
Sine rule
sinA/a = sinB/b = sinC/c
OR
a/sinA = b/sinB = c/sinC
What sides and angles in a triangle do you need to use the Sine Rule
Must have a complete pair and another either angle or side
Cosine Rule
a2 = b2 + c*2 -2bc cosA
When would you use the Cosine rule
To find an unknown angle when all three sides are given
An unknown side when two sides and the included angles are given
if the value of a (x^2) in quadratics is positive, what shape will the graph be
U
if the value of a (x^2) in quadratics is negative, what shape will the graph be
n
Rita says: I can tell form the denominators that 17/40 will convert into a terminating decimal but 17/70 will be recurring.
Explain how Rita can tell
The prime factors of 40 are 2 and 5 which both divide into 10 so 17/40 will terminate. 70 has a prime factor that will not divide into 10 so it will be recurring
