In this exercise, an Assertion is followed by the Reason. Mark the suitable answer from the given options:
| Assertion (A): | The value of \(\sin \theta \cos(90^\circ - \theta) + \cos \theta \sin (90^\circ - \theta)\) is \(1\). |
| Reason (R): | \(\tan \theta = \sec (90^\circ - \theta)\) |