FunctionHard
Question
The largest interval lying in
for which the function
is defined, is
for which the function
is defined, isOptions
A.[0, π]
B.

C.

D.

Solution
f (x) is defined if - 1 ≤
- 1 ≤ 1 and cos x > 0
or 0 ≤ x ≤ 4 and -
< x < 
∴ x ∈
- 1 ≤ 1 and cos x > 0or 0 ≤ x ≤ 4 and -
< x < 
∴ x ∈

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