Q15 / 87 · NTA Abhyas (JEE Main) 2020 · Mathematics · Functions

The minimum value of the function fx=tan⁡x3+2tan⁡x, ∀x∈0,π2 is

  • Correct answer
    A
    0
  • B
    12
  • C
    13
  • D
    16

Solution

If x∈0,π2, tanx∈0,∞

Let, tanx=t
i.e. y=t3+2t, t∈0,∞
⇒3y+2ty=t
⇒t=3y1-2y≥0
⇒y∈0,12
Hence, the minimum value of the function=0

Hence, the correct answer is option: 'A'.

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