Question

If pi <=x<= 2pi, then cos^-1(cos x) is equal to
(a) x
(b)-x
(C) 2pi + x
(d) 2pi - x​

Answer 1

Answer:

∈R –(–1,1). 5. sin–1x + cos–1x = π. 2. : x ∈[ –1,1] tan–1x + cot–1x = π. 2 ... Example 1 Find the principal value of cos–1x, for x = 3. 2 ... If 3tan–1 x + cot–1 x = π, then x equals ...

Missing: 2pi, ‎| Must include: 2pi,