12th Class
Mathematics
Sample Paper
Maths Olympiad Model Test Paper-10
question_answer
Find the values of x for which the angle between the vectors \[\overrightarrow{a}=2{{x}^{2}}\,\hat{i}+4\,x\hat{j}+\hat{k}\] and \[\overrightarrow{b}=7\,\hat{i}-2\hat{j}+x\hat{k}\] is Obtuse.