If $A = 130^\circ $ and $x = \sin A + \cos A,$ then
$x > 0$
$x < 0$
$x = 0$
$x \le 0$
(a) $x = \cos 40^\circ + \cos 130^\circ $
$= 2\cos 85^\circ \cos 45^\circ > 0$.
If $2y\,\cos \theta = x\sin \,\theta {\rm{ and }}2x\sec \theta – y\,{\rm{cosec}}\,\theta = 3,$ then ${x^2} + 4{y^2} = $
A circular wire of radius $7\,cm$ is cut and bend again into an arc of a circle of radius $12\,cm$. The angle subtended by the arc at the centre is ……$^o$
If $\cos A = \frac{{\sqrt 3 }}{2},$ then $\tan 3A = $
Which of the following relations is correct
If $\frac{{3\pi }}{4} < \alpha < \pi ,$ then $\sqrt {{\rm{cose}}{{\rm{c}}^2}\alpha + 2\cot \alpha } $ is equal to
