Find the value of tan-1⁡(\(\frac{1}{3}\))+tan-1⁡(\(\frac{1}{5}\))+tan-1⁡(\frac{1}{7})[/latex]

• A. tan-1⁡\((\frac{4}{7})\)
• B. tan-1⁡\((\frac{9}{7})\)
• C. tan-1⁡\((\frac{7}{9})\)
• D. tan-1⁡1