Created by hannahsquires
over 9 years ago


Question  Answer 
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. 
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