The angle between the unit vectors a and b is 0. By expanding the scalar product, show that (3a –b)·(a+3b) = 8 cos 0. 4 Given that 0 = 60°, show that the length of projection of (3a –b) onto (a+3b) is V13 %3D

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.