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Question
`"tan"^-1 1/3 + "tan"^-1 1/5 + "tan"^-1 1/7 + "tan"^-1 1/8 =` ____________.
Options
`pi`
`pi/2`
`pi/4`
`(3pi)/4`
MCQ
Fill in the Blanks
Solution
`"tan"^-1 1/3 + "tan"^-1 1/5 + "tan"^-1 1/7 + "tan"^-1 1/8 =` `underline(pi/4)`.
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