angle between diagonals of a parallelogram whose side represented by vector a =2i + j + k and vector b = i -j - k.

+1 vote
121 views
asked Jul 28, 2017 in Mathematics by Natsu d (35 points) 1 1
Option are

A)  cos^-1 (1/3)

B) cos^-1 (1/2)

Correct answer is A) plz help me how it came

1 Answer

+1 vote
answered Jul 28, 2017 by mannu (2,283 points) 2 7

Solution to your question:

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

One Thought Forever

“There is a close connection between getting up in the world and getting up in the morning.“
– Anon
~~~*****~~~

...