Q2 of 45 Page 1

Write the principal value of sec - 1 ( - 2).

The principal value of sec - 1( - 2) is

Sec - 1( - 2) = π - sec - 1( - 2)


Since, sec - 1( - x) = 180 - sec - 1x


Then,


Hence, The principal value of sec - 1( - 2) =


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