NDA MATHEMATICS QUIZ - 22

Attempt now to get your rank among 7 students!

Question 1:

$\cos 36^{\circ} \cdot \cos 72^{\circ} \cdot \cos 108^{\circ} \cdot \cos 144^{\circ}=\ldots$

Question 2:

$\tan 22 \frac{1}{2}^{\circ}$ equals:

Question 3:

$\frac{\sin 2 \theta-\sin \theta}{1+\cos 2 \theta-\cos \theta}=\ldots \ldots$

Question 4:

$(\cos \alpha-\cos \beta)^{2}+(\sin \alpha+\sin \beta)^{2}=\ldots \ldots$

Question 5:

$\frac{\sin A+\sin B-\sin (A+B)}{\sin A+\sin B+\sin (A+B)}$ = . . . . . . 

Question 6:

$\sqrt{2+\sqrt{2+2 \cos 4 x}}$ is equal to.

Question 7:

$\cos ^{2} 73^{\circ}+\cos ^{2} 47^{\circ}+\cos 73^{\circ} \cdot \cos 47^{\circ}=\ldots .$

Question 8:

If $\sin 5 \theta=a \sin ^{5} \theta+b \sin ^{3} \theta+c \sin \theta$ then

Question 9:

$\frac{4 \tan ^{3} \theta}{1-\tan ^{4} \theta}$ equals:

Question 10:

If $\cos x=\frac{1}{2}\left(m+\frac{1}{m}\right)$ then $\cos 3 \theta$ equals