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Question
`"tan"^-1 "x" + "tan"^-1 "y" = "tan"^-1 ("x + y")/(1 - "xy")` is true for ____________.
Options
`"x, y" in "R"`
`"IxI" > 1, "IyI" > 1`
`"IxI" < 1, "IyI" < 1`
`"xy" < 1`
MCQ
Fill in the Blanks
Solution
`"tan"^-1 "x" + "tan"^-1 "y" = "tan"^-1 ("x + y")/(1 - "xy")` is true for `underline("xy" < 1)`.
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Inverse Trigonometric Functions - Graphs of Inverse Trigonometric Functions
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