7. probability formula - working out the outcome of each A and B with P being their probability.
its okay if you don't know the exact formula for this as usually you can just work it out using skills from probability itself.
a and b are just values for wh
P(A and B) = P(A when given B) x P(B)
P(A and B) = P(A when given B) - P(B)
P(A and B) = P(A when given B) + P(B)
8. VOLUME of prism
length x area of cross section^3
length x 1/2 area of cross section
length x area of cross section
length x area of cross section^2
9. area of a trapezium.
a and b being the sides and h being the height and ^2 meaning squared
1/2 (a + b) h
1/2 (a^2 + b ^2 ) h
1/2 (a + h) b
1/2 a (b +h)
10. area of a circle. r being radius d being diameter h being height
π r^3
π rh
π r^2
π d^2
11. circumference of a circle
2π r
2π
π r
1/2π r
12. area of a triangle where the length of sides are unknown
the sin cos tan are the same as used in trigonometry sohcahtoa
1/2 ab sinC
1/2 a sin bc
1/3 a cos bc
1/2 abc tan
13. cos angle pythagoras
cos θ = h x o
cos θ = a/h
cos θ = a x h
cos θ = h/a
14. area of a parellelogram
b x h
b x h^2
b x h + 3
1/2 b x h ^3
15. sine rule
a b c
____ = _____ = ______
sin B sin C sin A
a b c
____ = _____ = ______
sin A sin B sin C
a b c
____ = _____ = ______
sin sin B sin C
a b c
____ = _____ = ______
tan A cos B sin C
16. speed, distance, time formula (same one in physics)
speed = time/distance
speed = distance x time
speed = distance/time
speed = time/velocity
17. area of triangle where you know the side lengths
