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Mathematics 11 Online
OpenStudy (anonymous):

if theta = cot^-1 7 + cot ^-1 8 + cot ^-1 18 , then cot theta is =?

OpenStudy (anonymous):

\[\cot^{-1}x + \cot^{-1} y = \cot^{-1}(xy - 1)/(x + y)\] You have to use this Inverse Trigonometric Identity to get your answer...

OpenStudy (anonymous):

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