# Maths Formulas and uses

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• Maths Formulas & uses
• speed= distance / time
• Therefore: time= distance/speed & distance = speed * time
• This means that on any question where they ask you for speed you need to identify those items
• The unit for speed is m/s, distance is m, and time is s
• needs to be in the form ax2+bx+c= 0 to be applied
• if there is no ax2 then it is not a quadratic, it is linear
• The Sine Rule
• Used when you have 2 angles and 1 side, or 2 sides and 1 angle
• USED IN TRIANGLES
• a/sinA =b/sinB
• The Cosine Rule
• USED IN TRIANGLES
• a2=b2+c2- 2bccosA