Q. 65.0( 3 Votes )

Write the princip

Answer :

To find: the principal value of cot-1 (-√3)

Let y = cot-1 (-√3)

cot y = -√3

We know,

cot 30° = √3

{ cot θ = x cot (π - θ) = -x}

cot y = -√3

The range of principal value of cot-1 is (0, π)

Hence, the principal value of cot-1 (-√3) is

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