Ong Qian Wei's answer to Sonia's Junior College 2 H2 Maths Singapore question.
done
{{ upvoteCount }} Upvotes
clear
{{ downvoteCount * -1 }} Downvotes
Hope you’re able to see :)
1) a•b is a scalar, so basically vector a is just a scalar multiple of vector b. They have to be in the same direction, but provided a•b is positive. Otherwise they are opposite directions.
Vector b has to be a unit vector because Vector a is the vector projection along vector b, which based on the projection formula, Vector b has to be a unit vector.
2) geometrically sketch and show that OP is perpendicular to AP then try to move P around
1) a•b is a scalar, so basically vector a is just a scalar multiple of vector b. They have to be in the same direction, but provided a•b is positive. Otherwise they are opposite directions.
Vector b has to be a unit vector because Vector a is the vector projection along vector b, which based on the projection formula, Vector b has to be a unit vector.
2) geometrically sketch and show that OP is perpendicular to AP then try to move P around
Date Posted:
4 years ago
360 Tutoring Program