When do you use trigonometry?
(sOhcAhtOa)

In right angled triangles where an interior angle is involved (not the 90 degree one) and you know 2 measurements.

When do you use Pythagoras?
(a squared + b squared = c squared)

When no angles are involved, trying to find a length.

In Pythagoras where is c?

Opposite the right angle.

When is the sine rule used?
(a/sinA = b/sinB = c/sinC)

On a nonright angled triangle to find angles or sides.

When is the cosine rule used?

In a nonright angled triangle when the is no matching pair.

What is a good way to solve a quadratic equation?
(x squared+x+n=0)

The quadratic formula in the front of paper.

In a histogram what is the width and how do you get it?

The class width = the range between each individual variable category ie'height 0<20' would be the difference between 0 and 20.

In a histogram what is the height and how do you calculate it?

frequency density = freq density/class width

In a histogram how do you find out the mean?

Total(midpoint x freq)/total freq

How do you solve an algebraic equation graphically?

1) Plot
2) state where they cross

What is 'BIDMAS'?

Calculate things in the order of:
Brackets, Indices(powers), Division, Multiplication, Addition, Subtraction.
