find d/dx of tan x by first principle - Maths - Limits and Derivatives

Question

find d/dx of tan x by first principle ?

Lalit Mehra · Accepted Answer

Hi!
<img width="339" height="283" src=
"https://s3mn%20mnimgs%20com/img/shared/userimages/mn_images/image/a1(1609)%20png"
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<img width="710" height="263" src=
"https://s3mn%20mnimgs%20com/img/shared/userimages/mn_images/image/a2(449)%20png"
alt="">
Cheers!