The teachers’ library›Coordinates and vectorsCross producta⃗×b⃗=∣∣∣∣∣∣ia1b1ja2b2ka3b3∣∣∣∣∣∣a⃗×b⃗=|ijka1a2a3b1b2b3|∣a⃗×b⃗∣=∣a⃗∣∣b⃗∣sinθ∣a⃗×b⃗∣=∣a⃗∣∣b⃗∣sinθOpen on a new board The board is kept in this browser only, like your other boards. On any board, the Library button adds this too.More in Coordinates and vectorsDistance formulaMidpoint formulaSlope and equations of a lineEquation of a circleVectors: components and magnitudeDot productCoordinates in space