+2 votes
by (65 points)
edited by
Value of cos(-1710)

1 Answer

+3 votes
by (24.0k points)
selected by
Best answer

We know that values of cos x repeats after an interval of 2π or 360°. 
Therefore, cos (–1710°) = cos (–1710° + 5 x 360°) 
= cos (–1710° + 1800°) = cos 90° = 0.

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.