Dear Colleagues, Could you please help me in solving the following problem: What is the value of (tan5)(tan25)(tan45)(tan65)(tan85)? Best Regards.

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Originally Posted by raed Dear Colleagues, Could you please help me in solving the following problem: What is the value of (tan5)(tan25)(tan45)(tan65)(tan85)? Best Regards. Hint: Look for a connection between tan(5) and tan(85) (you may find it helpful to draw a right-angled triangle).

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