જો $\cos 3\theta = \alpha \cos \theta + \beta {\cos ^3}\theta ,$ તો $(\alpha ,\beta ) = $
જો $\cos 3\theta = \alpha \cos \theta + \beta {\cos ^3}\theta ,$ તો $(\alpha ,\beta ) = $
- A
$(3,\,4)$
- B
$(4,\,3)$
- C
$( - 3,\,4)$
- D
$(3,\, - 4)$
Similar Questions
$2\sin A{\cos ^3}A - 2{\sin ^3}A\cos A = $
$2\sin A{\cos ^3}A - 2{\sin ^3}A\cos A = $
જો $\tan \beta = \cos \theta \tan \alpha ,$ તો ${\tan ^2}\frac{\theta }{2} = $
જો $\tan \beta = \cos \theta \tan \alpha ,$ તો ${\tan ^2}\frac{\theta }{2} = $
જો $\tan \alpha = \frac{1}{7},\;\tan \beta = \frac{1}{3},$ તો $\cos 2\alpha = $
જો $\tan \alpha = \frac{1}{7},\;\tan \beta = \frac{1}{3},$ તો $\cos 2\alpha = $
જો $\cos A = \frac{3}{4}$, તો $32\sin \frac{A}{2}\cos \frac{5}{2}A = $
જો $\cos A = \frac{3}{4}$, તો $32\sin \frac{A}{2}\cos \frac{5}{2}A = $
જો $cos A = {3\over 4} , $ તો $32\sin \left( {\frac{A}{2}} \right)\sin \left( {\frac{{5A}}{2}} \right) = $
જો $cos A = {3\over 4} , $ તો $32\sin \left( {\frac{A}{2}} \right)\sin \left( {\frac{{5A}}{2}} \right) = $