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Maths Algebra
Question | Answer |
---|---|
Describe a vector | A directed line segment joining two points |
Notation for 3 dimensional space | R^3 |
Notation for 2 dimensional space | R^2 |
Dot Product Equation Vectors P & Q | OP.OQ = [OP].[OQ]cos(teta) |
Method for measuring angles | Measure anticlockwise from between 0 & pi radians |
If P=(a,b) and Q=(c,d) what is the dot product? | a*c+b*d |
Define the positive normal P=(a,b) P is not 0 | Positive normal = (-b,a) and is perpendicular to P |
Proof of normal positive Np=(-b,a) | ONp.OQ = (-b,a).(c,d) |