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10 cards from this deck
Length or size of the vector
a12+a22\sqrt{a_1^2 + a_2^2}a12+a22
a12+a22+a32\sqrt{a_1^2 + a_2^2 + a_3^2}a12+a22+a32
Angle the vector makes with a reference axis
θ=tan−1(a2a1)\theta = \tan^{-1}\left(\frac{a_2}{a_1}\right)θ=tan−1(a1a2)
Magnitude
180°+α180° + \alpha180°+α (where α\alphaα is reference angle)
lcosθl\cos\thetalcosθ
lsinθl\sin\thetalsinθ
13\sqrt{13}13
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