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If a and b are unit vectors and θ is the angle between them, then prove that cos θ/2 = ½ |a+b|

If a and b are unit vectors and θ is the angle between them, then prove that
cos θ/2 = ½ |a+b|

Grade:12

2 Answers

Saurabh Kumar
askIITians Faculty 2411 Points
6 years ago
In this problem, it is given that the magnitude of unit vectors are unity.
Calculate the resultant of tese given vectors, as R = a + b
Find its magnitude and calculate mathematically...You will get the required result..........................................
Good Luck......................
Saurabh Kumar
askIITians Faculty 2411 Points
6 years ago

In this problem, it is given that the magnitude of unit vectors are unity. Calculate the resultant of tese given vectors, as R = a + b Find its magnitude and calculate mathematically...You will get the required result.......................................... Good Luck......................

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