$\tan 3A - \tan 2A - \tan A = $

$1 - 2{\sin ^2}\left( {\frac{\pi }{4} + \theta } \right) = $

જો $A = 133^\circ ,$ તો $\;2\cos \frac{A}{2}  = . . . .$

જો  $x\cos \theta = y\cos \,\left( {\theta + \frac{{2\pi }}{3}} \right) = z\cos \,\left( {\theta + \frac{{4\pi }}{3}} \right),$ તો $\frac{1}{x} + \frac{1}{y} + \frac{1}{z}$ ની કિમંત મેળવો.

$\frac{1}{{\sin 10^\circ }} - \frac{{\sqrt 3 }}{{\cos 10^\circ }} =$

જો $\cos \left( {\frac{{\alpha - \beta }}{2}} \right) = 2\cos \left( {\frac{{\alpha + B}}{2}} \right)$, તો $\tan \frac{\alpha }{2}\tan \frac{\beta }{2}  = . . .$