Principle value of: sec-1[cosec pie/8] Share with your friends Share 2 Navin Saxena answered this Sec -1 (Cosec pi/8) = Sec -1 (Sec (pi/2 -pi/8) ) = Sec -1 (Sec3pi/8) = 3pi/8 8 View Full Answer Ananya answered this pie/8 means 180/8= 45/2 as sec-1 (sec 45/2) = 45/2 ....... -3
