Which of the following functions is strictly increasing on (0, π/2)?
Which of the following functions is strictly increasing on (0, π/2)?
- A. cos x
- B. cot x
- C. cosec x
- D. tan x
Answer: D) tan x
Explanation: The derivative of tan x is sec²x, which is positive for all x in (0, π/2). Thus, tan x is strictly increasing. The others have negative derivatives.
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