Which of the following is/are correct? \( \mathrm{P} \) (1) \( \sin...

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Which of the following is/are correct?
\( \mathrm{P} \)
(1) \( \sin (100 \pi)=0 \)
W
(2) \( \sin \left(\frac{399 \pi}{2}\right)=-1 \)
(3) \( \cot \left(\frac{5 \pi}{2}\right)=0 \)
(4) \( \tan \left(\frac{7 \pi}{2}\right) \) is not defined
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