How do you use a calculator to approximate $arctan 0.92$ ?

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Answer 1 · 2017-02-08T05:39:05

$42^@61, 222^@61$

Use calculator:
tan x = 0.92 --> arc $x = 42^@61$
Trig unit circle give another arc x that has the same tan value:
$x = 42^@61 + 180^@ = 222^@61$

How do you use a calculator to approximate arctan 0.92arctan 0.92?