Question

#Challenge_to_BrainlyMods&Gods...

✧Question :
$\\ Q. \: If \: A= \frac{\pi}{5} , \: then \: find \: the \: value \: of\: : \\ \\ \sum _{r = 1}^{8} \: tan(rA).tan(r + 1)A$
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Answer 1

Answer:

as a = pi/5

a=110/7

Step-by-step explanation: