Show that : `2tan^-1frac{1}{3}+tan^-1frac{1}{7}=pi/4`

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Show that : tan^-1frac{1}{2}+tan^-1frac{1}{3}=pi/4

Show that : 2sin^-1frac{3}{5}=tan^-1frac{24}{7}

Show that : tan^-1frac{1}{3}+tan^-1frac{1}{5}+tan^-1frac{1}{7}+tan^-1frac{1}{8}=pi/4

Show that : tan^-1frac{1}{7}+tan^-1frac{1}{13}=tan^-1frac{2}{9}

Show that : tan^-1frac{1}{2}+sin^-1frac{1}{sqrt10}=pi/4

Show that : cos(2tan^-1frac{1}{7})=sin(4tan^-1frac{1}{3})

In triangleABC , right-angled at C, prove that tan^-1frac{a}{b+c}+tan^-1frac{b}{a+c}=pi/4

Solve for x : tan^-1frac{x-1}{x-2}+tan^-1frac{x+1}{x+2}=pi/4

Show that : cos^-1frac{12}{13}+sin^-1frac{3}{5}=sin^-1frac{56}{65}

Show that : sin^-1 frac{4}{5}+sin^-1frac{5}{13}+sin^-1frac{16}{65}=pi/2