Question : Evaluate the following.
$\sin 25° \sin 65° – \cos 25° \cos 65°$

Option 1: 4

Option 2: 1

Option 3: 0

Option 4: 40

Question : Evaluate the expression: $\frac{\sin ^2 63^{\circ}+\sin ^2 27^{\circ}}{\cos ^2 17^{\circ}+\cos ^2 73^{\circ}}$

Option 1: 0

Option 2: 3

Option 3: 1

Option 4: 2

Question : What will be the value of $\frac{\sin 30^{\circ} \sin 40^{\circ} \sin 50^{\circ} \sin 60^{\circ}}{\cos 30^{\circ} \cos 40^{\circ} \cos 50^{\circ} \cos 60^{\circ}}$?

Option 1: $\frac{1}{\sqrt{2}}$

Option 2: $\sqrt{3}$

Option 3: $1$

Option 4: $\frac{1}{\sqrt{3}}$

Question : Evaluate the following:
$\cos \left(36^{\circ}+A\right) \cdot \cos \left(36^{\circ}-A\right)+\cos \left(54^{\circ}+A\right) \cdot \cos \left(54^{\circ}-A\right)$

Option 1: $\sin 2A$

Option 2: $\cos A$

Option 3: $\sin A$

Option 4: $\cos 2A$

Question : Find the value of $\sin^2 25^\circ+\sin^2 65^\circ$:

Option 1: $-1$

Option 2: $\frac{1}{2}$

Option 3: $0$

Option 4: $1$