Find the principal value of: i) `sin^(-1)(-1/sqrt(2))`, ii) `cos^(-1)(-sqrt(3)/2)` iii) `tan^(-1)(-sqrt(3))` iv) `sec^(-1)(-2)` v) `"cosec"^(-1)(-sqrt

Monjur Alahi

Find the principal value of:
i) `sin^(-1)(-1/sqrt(2))`,
ii) `cos^(-1)(-sqrt(3)/2)`
iii) `tan^(-1)(-sqrt(3))`
iv) `sec^(-1)(-2)`
v) `"cosec"^(-1)(-sqrt(2))`,
vii) `cot^(-1)(-1/sqrt(3))`.


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Salim Ahmed Kawsar

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Correct Answer - i) `-pi/4`, ii) `(5pi)/6`, iii) `-pi/3`, iv) `(2pi)/3`, v) `-pi/4`, vi) `(2pi)/3`

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