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Aloiza [94]
2 years ago
7

Select the correct answer.

Mathematics
1 answer:
Katena32 [7]2 years ago
3 0

Answer:

I think No B

if wrong correct me pls

have a great day

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lidiya [134]

Alright, lets get started.

The answer Sandra got is correct that is zero but there are some mistakes she made while writing steps.

2 cot(\frac{-9\pi}{2})  =  2 cot(\frac{9\pi}{2}) Incorrect step

Because as per even/odd identity,

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Now,

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