Question

Chap 6
Vector (angle...)

Answer 1

http://prntscr.com/4v45o3

Answer 2

@ganeshie8

Answer 3

http://prntscr.com/4v462h

Answer 4

your goal is to find the angle between `given line` and `given plane` and you can get below readymade :
1) direction vector of given line
2) normal vector of given plane

Answer 5

in dot product formula,
the angle present is the
ANGLE BETWEEN THE VECTORS.

Answer 6

Okay
Why do I need to use cos(90- theta) instead of sin theta