We will get the area of this parallelogram and then half it
If that sum is equal to 360° (Radians: 2π) then we know the point is inside the triangle and is outside if not.
As a practical example of where 3D vectors might be required, consider the power line pole. It uses a tension cable anchored in the ground to resist the ...
Vector addition for vectors at any angle | Adding vectors | How to add vectors
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A-level Physics (Advancing Physics)/Vectors/Trigonometry - Wikibooks, open books for an open world