3. \( \sin \left(\frac{\pi}{2}+\theta\right) \cdot \cos \left(\frac{3 \pi}{2}+\theta\right) \cdot \tan \left(\frac{5 \pi}{2}+\theta\right) \cdot \cot \left(\frac{7 \pi}{2}+\theta\right) \) is equal to
(1) \( -\sin ^{2} \theta \)
(2) \( -\cos ^{2} \theta \)
(3) \( \sin \theta \cdot \cos \theta \)
(4) \( -\sin \theta \cdot \cos \theta \)
