Question

$cot( - 15\pi \div 4)$
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Answer 1

Answer:

answer is 0[zero]. this is the correct answer

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Answer 2

Answer:

1

Step-by-step explanation:

$\cot( \frac{ - 15\pi}{4} ) \\ = - \cot( \frac{15\pi}{4} ) \\ = - \cot(4\pi - \frac{4}{\pi} ) \\ = - ( - \cot( \frac{4}{\pi} ) ) \\ = \cot( \frac{\pi}{4} ) \\ = \cot( \frac{180}{4} ) \\ = \cot(45) \\ = 1$