Teaching RPSC School Lecturer Mock Test Series 2024 Mathematics Vector Algebra Scalar and Vector Product
Comprehension Passage
Direction: For the next two (2) items that follow:
Let â, b̂ be two unit vectors and θ be the angle between them.What is \(\cos \left( {\frac{{\rm{\theta }}}{2}} \right)\) equal to?
1
\(\frac{{\left| {{\rm{\hat a}} - {\rm{\hat b}}} \right|}}{2}\)
2
\(\frac{{\left| {{\rm{\hat a}} + {\rm{\hat b}}} \right|}}{2}\)
3
\(\frac{{\left| {{\rm{\hat a}} - {\rm{\hat b}}} \right|}}{4}\)
4
\(\frac{{\left| {{\rm{\hat a}} + {\rm{\hat b}}} \right|}}{4}\)
5
Question Not Attempted