Let S, = ,left{ {theta , in ,[ - ,2,pi , | vedclass

Name: PDF Generator App | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

$2\,(1 - {\sin ^2}	heta )\, + \,3\,\sin \,	heta \, = \,0$

$ \Rightarrow {\kern 1pt} 2\,{\sin ^2}	heta \, - \,3\sin \,	heta \, - \,2\, = \,0$

Vedclass · Accepted Answer

$2\pi $

Vedclass · Answer

$2\,(1 - {\sin ^2}	heta )\, + \,3\,\sin \,	heta \, = \,0$

$ \Rightarrow {\kern 1pt} 2\,{\sin ^2}	heta \, - \,3\sin \,	heta \, - \,2\, = \,0$

$ \Rightarrow (2\,\sin 	heta  + 1)(\sin 	heta  - 2) = 0$

$ \Rightarrow \sin 	heta \, = \, - \frac{1}{2};\,\,\,\sin 	heta  = 2$  (reject)

roots  :  $\pi \, + \,\frac{\pi }{6}\,,\,2\pi  - \frac{\pi }{6},\, - \frac{\pi }{6},\, - \pi  + \frac{\pi }{6}$

$\Rightarrow $ Sum off values $=\,2\pi $

Let $S\, = \,\left\{ {\theta \, \in \,[ - \,2\,\pi ,\,\,2\,\pi ]\, :\,2\,{{\cos }^2}\,\theta \, + \,3\,\sin \,\theta \, = \,0} \right\}$. Then the sum of the elements of $S$ is

Similar Questions

The general value of $\theta $ satisfying the equation $\tan \theta + \tan \left( {\frac{\pi }{2} - \theta } \right) = 2$, is

If $\left| {\,\begin{array}{*{20}{c}}{\cos (A + B)}&{ - \sin (A + B)}&{\cos 2B}\\{\sin A}&{\cos A}&{\sin B}\\{ - \cos A}&{\sin A}&{\cos B}\end{array}\,} \right| = 0$, then $B =$

The only value of $x$ for which ${2^{\sin x}} + {2^{\cos x}} > {2^{1 - (1/\sqrt 2 )}}$ holds, is

The number of values of $x$ in the interval $[0, 5 \pi ] $ satisfying the equation $3{\sin ^2}x - 7\sin x + 2 = 0$ is

If $\sqrt 3 \cos \,\theta + \sin \theta = \sqrt 2 ,$ then the most general value of $\theta $ is