Q. 34.0( 4 Votes )

If 𝒴 = x + tan x, show that cos2 . - 2𝒴+ 2x = 0.

Answer :

y = x + tan x, tan x = y-x…. (i)


Differentiating with respect to x



Differentiating with respect to x





[putting value of tan x from (i) ]




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