Question : Evaluate the following.
$\sin 25^{\circ} \sin 65^{\circ}-\cos 25^{\circ} \cos 65^{\circ}$.

Option 1: 40

Option 2: 4

Option 3: 0

Option 4: 1

Question : Find the value of the given expression.
2 + cos 49°cos 41° – sin 49° sin 41°

Option 1: 2

Option 2: –1

Option 3: 0

Option 4: 1

Question : The value of $(\cos 53° – \sin 37°)$ is:

Option 1: $0$

Option 2: $1$

Option 3: $2 \sin 37°$

Option 4: $2 \cos 53°$

Question : The value of $\frac{\sin A}{1+\cos A}+\frac{\sin A}{1-\cos A}$ is $(0°<A<90°)$:

Option 1: $2\operatorname{cosec}A$

Option 2: $2 \sec A$

Option 3: $2 \sin A$

Option 4: $2 \cos A$

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