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