JEE PYQ: Matrices And Determinants Question 80
Question 80 - 2019 (10 Jan Shift 2)
The number of values of $\theta \in (0, \pi)$ for which the system of linear equations $x + 3y + 7z = 0$, $-x + 4y + 7z = 0$, $(\sin 3\theta)x + (\cos 2\theta)y + 2z = 0$ has a non-trivial solution, is:
(1) three
(2) two
(3) four
(4) one