JEE Main 2021 Mathematics question
Let =(1,-,), =(3,,-) and =(-,-2,1); , be three vectors such that . If magnitudes of the vectors and are ,1 and 2 respectively and the angle between is , then the value of 1 + is equal to.
Answer: 9
Let =(1,-,), =(3,,-) and =(-,-2,1); , be three vectors such that . If magnitudes of the vectors and are ,1 and 2 respectively and the angle between is , then the value of 1 + is equal to.