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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) \( -\sin \theta \cdot \cos \theta \)

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