मान ज्ञात कीजिए -
` sec^(-1)(-sqrt(2))`

Answer

`(3pi)/(4)`

Explanation

`sec^(-1)(-sqrt(2))=x`
`implies sec x =-sqrt(2)=-sec""(pi)/(4)=sec(pi-(pi)/(4))=sec""(3pi)/(4)`
`implies x=(3pi)/(4)`