Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
1.5k views
in Trigonometry by (46.9k points)
closed by

Let fk (x) = (1/k)[sink x + cosk x] where x ∈ R and k ≥ 1. Then f4(x) - f6(x) = .....

(a) 1/4

(b) 1/12

(c) 1/6

(d) 1/3

1 Answer

+1 vote
by (49.1k points)
selected by
 
Best answer

Answer is (b) 1/12

fk (x) 

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.

...