- Home
- Standard 11
- Mathematics
Trigonometrical Equations
medium
સમીકરણ $\left| {\,\begin{array}{*{20}{c}}{\cos \theta }&{\sin \theta }&{\cos \theta }\\{ - \sin \theta }&{\cos \theta }&{\sin \theta }\\{ - \cos \theta }&{ - \sin \theta }&{\cos \theta }\end{array}\,} \right| = 0$ નો ઉકેલ મેળવો.
A
$\theta = n\pi $
B
$\theta = 2n\pi \pm \frac{\pi }{2}$
C
$\theta = n\pi \pm {( - 1)^n}\frac{\pi }{4}$
D
$\theta = 2n\pi \pm \frac{\pi }{4}$
Solution
(b) After solving the determinant $2\cos \theta = 0$
==> $\theta = 2n\pi \pm \frac{\pi }{2}$.
Standard 11
Mathematics
