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प्रश्न
Show that function f(x) = tan x is increasing in `(0, π/2)`.
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उत्तर
Given, f(x) = tan x
f'(x) = sec2x
But sec2x > 0, ∀x∈ (0, π/2)
Hence f(x) = tan x is strictly increasing in (0, π/2).
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