1/cos0cos1 +1/cos1cos2 +......+1/cos88cos89 is equal to 1. sin1/cos21 2.cos1/sin2 1 3.sin21/cos21 34.cos21/sin1 Share with your friends Share 0 Ankita Agarwal answered this Dear Student, Hence Option (2) is correct Regards 2 View Full Answer
