DSE CH14
Applications of Trigonometry (III) – 3D
三角比3D的應用
由 楊老師 任教
$1000
課程概要：
兩條直線的夾角 Angle Between Two Intersection Straight
直線與平面的夾角 Angle Between a Straight Line and a Plane
兩個相交平面的夾角 Angle Between Two Intersecting Plane