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arg ` ( - 1 - i ) = `A. ` ( pi ) / ( 4 ) `B. ` ( 5pi ) / ( 4 ) `C. ` ( 3pi ) / ( 4 ) `D. ` ( 7 pi ) / ( 4 ) `

Answer» Explanation : Let ` z = - 1 - i ` , यहाँ ` x = - 1 , y = - 1 `
` therefore tan theta = | ( y ) / ( x ) | = | ( - 1 )/ ( - 1 ) | = 1 therefore theta = ( pi ) /( 4 ) " " [ 0 ` से ` 90 ^ @ ` के बीच ]
चूँकि ` x lt 0 , y lt 0 ` अतः z तृतीय पाद में है
` therefore arg z = pi + theta = pi + ( pi ) /( 4 ) = ( 5pi ) / ( 4 ) `


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