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· 1 Months ago

explain last third step

Question:
cot  \(\cfrac{π}{32}\) – tan  \(\cfrac{π}{32}\) – 2tan  \(\cfrac{π}{16}\) = ?
Options:
A) 4 cot \(\cfrac{π}{8}\)
B) 0
C) 2 cot \(\cfrac{π}{8}\)
D) cot \(\cfrac{π}{8}\)
Solution:

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