>I suggest teaching vectors before trig. You can get the cosine and sine from the dot and cross products. What about geometric algebra instead? http://www.sha

>I suggest teaching vectors before trig. You can get the cosine and sine from the dot and cross products. What about geometric algebra instead? http://www.shapeoperator.com/2016/12/12/sunset-geometry/ http://www.shapeoperator.com/2016/12/12/sunset-geometry/