Question

The minimum value of cos(cosx) is

• A. 0
• B. –cos1
• C. cos1
• D. –1

Answer 1

Answer: (C)

cos1

Answer 2

cosx varies from –1 to 1 for all real x.

Thus cos(cosx) varies from cos1 to cos0.

⇒ minimum value of cos(cosx) is cos1