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Aprogressivist/Mathstuff
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User:Aprogressivist
Reminders:
a
×
b
=
a
b
sin
θ
n
^
{\displaystyle \mathbf {a} \times \mathbf {b} =ab\sin \theta \ \mathbf {\hat {n}} }
a
⋅
b
=
|
a
|
|
b
|
cos
θ
{\displaystyle \mathbf {a} \cdot \mathbf {b} =|\mathbf {a} |\,|\mathbf {b} |\cos \theta \,}