Find the measures of one positive and one negative angle tha

Find the measures of one positive and one negative angle that are conterminal with the given angle: a) 25 pi/9, - 11pi/9 b) 16 pi/9, - 16 pi/9 c) 11 pi/9; - 25 pi/9 d) 16 pi/9; - 11 pi/9

Solution

Given angle=7pi/9

positive coterminal 7pi/9 +2pi =(7pi+18pi)/9=25pi/9

negative coterminal 7pi/9-2pi=(7pi-18pi)/9 =-11pi/9

option a