# 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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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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