Search for: If a1,a2,…,an are in AP with common difference d, then the sum of the series sind cosec a1cosec a2+cosec a2cosec a3+…+cosecan−1cosecan is If a1,a2,…,an are in AP with common difference d, then the sum of the series sind cosec a1cosec a2+cosec a2cosec a3+…+cosecan−1cosecan is Aseca1−secanBcota1−cotanCtana1−tananDcoseca1−cosecan Fill Out the Form for Expert Academic Guidance!l Grade ---Class 1Class 2Class 3Class 4Class 5Class 6Class 7Class 8Class 9Class 10Class 11Class 12 Target Exam JEENEETCBSE +91 Preferred time slot for the call ---9 am10 am11 am12 pm1 pm2 pm3 pm4 pm5 pm6 pm7 pm8pm9 pm10pm Please indicate your interest Live ClassesBooksTest SeriesSelf Learning Language ---EnglishHindiMarathiTamilTeluguMalayalam Are you a Sri Chaitanya student? NoYes Verify OTP Code (required) I agree to the terms and conditions and privacy policy. Solution:Since,a1,a2,a3,…,an are in AP⇒ d=a2−a1=a3−a2=…=an−an′−1∴sindcoseca1coseca2+…+cosecan−1cosecan=sina2−a1sina1sina2+…+sinan−an−1sinan−1sinan=sina2cosa1−cosa2sina1sina1sina2+…+sinancosan−1+cosansinan−1sinan−1sinan=cota1−cota2+cota2−cota3 +…+cotan−1−cotan=cota1−cotan Related content Female Reproductive System Diagram Class 10 NCERT Solutions for Class 11 English Reading Skills Chapter 1 The Portrait of a Lady 50+ Simple GK Questions and Answers for Class 8 Animal Cell Diagram Class 9 Preparation Strategy for NEET Repeaters CBSE Power Sharing Class 10 MCQs Political Science Chapter 1 How to Self Study for NEET Dropper at Home? CBSE Class 9 English Wind Worksheet Viram Chinh in Hindi Worksheets Class 9 with Answers MP Board Class 8 Result 2024 – MPBSE Class 8 Result (Out)