If for real values of $x,\cos \theta = x + \frac{1}{x},$ then
$\theta $ is an acute angle
$\theta $ is a right angle
$\theta $ is an obtuse angle
No value of $\theta $ is possible
$(m + 2)\sin \theta + (2m - 1)\cos \theta = 2m + 1,$ if
Which of the following is correct
Prove that: $\frac{(\sin 7 x+\sin 5 x)+(\sin 9 x+\sin 3 x)}{(\cos 7 x+\cos 5 x)+(\cos 9 x+\cos 3 x)}=\tan 6 x$
Find the angle in radian through which a pendulum swings if its length is $75\, cm$ and the tip describes an arc of length.
$10 \,cm$
Which of the following relations is possible