If 0 ≤ x ≤ π/2 what is the maximum value of cos (x/3)?

A 1

C 1/2

D √3/2

Correct Answer: Option A

এখানে, 0 ≤ x ≤ π/2
এখন, x = 0 হলে
cos(x/3)
= cos(0/3)
= cos0
=1
এটি সর্বোচ্চ মান।