A geometry problem by أحمد الحلاق

Geometry Level 2

\[ \log (\tan 3^\circ) + \log(\tan 6^\circ) + \log(\tan 9^\circ) + \cdots + \log( \tan 87^\circ) = \, ? \]

Clarification: 3, 6, 9,... 87 follows an arithmetic progression.

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