1.If f(x)=[tanx]2f(x)=[\tan x]^2f(x)=[tanx]2, x∈(0,π3)x\in(0,\frac{\pi}{3})x∈(0,3π), then f′(π4)f'(\frac{\pi}{4})f′(4π) (where [.][.][.] is GIF)a.is equal to 111b.is equal to 000c.does not existd.None of theseLogin to continueOnly logged in users canattempt or see the solution.
