Question

the value of cos(tan inverse (tan2)) is
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Answer 1

$\huge\mathbb\green{ANSWER}$

➜ cos(tan−¹(tan 2))

➜ cos(tan −¹(−tan(π−2)))

➜ cos(−tan −¹(tan(π−2)))

➜ cos(−π−2)

➜ cos(π−2)

➜ −cos2

Answer → $\green{- cos 2}$

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