Let a vector a = 2 i - j + k , 0, make an obtuse angle with the vector b =- ^2 i +4 2 j +4 2 k and an angle...

Question

Let a vector a = 2 i - j + k , >0, make an obtuse angle with the vector b =- ^2 i +4 2 j +4 2 k and an angle , 6 < < 2 , with the positive z-axis. If the set of all possible values of is ( , )- , then + + is equal to ____ .

Accepted Answer

5

JEE Main 2026 Mathematics question

Solution