Fewpal
+11 votes
7.9k views
in Mathematics by (127k points)
edited by

Prove that : 2cos(π/13)cos(9π/13) + cos(3π/13) + cos(5π/13) = 0

1 Answer

+7 votes
by (13.5k points)
selected by
 
Best answer

Proof is given below:

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...