qnoah67
qnoah67 qnoah67
  • 13-06-2022
  • Mathematics
contestada

Derive this with respect to x
[tex] \frac{3}{(1 + secx) } [/tex]
​

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loneguy
loneguy loneguy
  • 13-06-2022

[tex]~~~~\dfrac{d}{dx} \left(\dfrac{3}{1 + \sec x} \right)\\\\\\=3 \dfrac{d}{dx} \left( \dfrac 1{ 1+ \sec x} \right)\\\\\\=3 \dfrac{d}{dx} (1+ \sec x)^{-1}\\\\\\=3 (-1) (1 + \sec x )^{-1 -1} \dfrac{d}{dx}( 1 + \sec x)\\\\\\=-3(1 + \sec x)^{-2} ( 0 + \sec x \tan x)\\\\\\=-\dfrac{3\sec x \tan x}{(1 + \sec x)^2}[/tex]

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