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Find Derivative of tan x from first principle. |
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Answer» f (x+h)=lim h->0 tan (x+h)-tanx /h ;lim h->0 sin (x+h-x)/cos (x+h)cosx .h ;lim h->0 sin h/h cos (x+h)cosx ;lim h->0 1/cos (x+h)cosx ;Putting h=01/cos (x+0)cosx ;1/cosx.cosx ;1/cosx^2 ;Secx^2 its sec^2 x Answer |
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