Question

4 - 4 tan X + tan ^ 2 X

Answer 1

its of form y^2-4y+4
here y = tanx

Answer 2

y^2-2y-2y+4
y(y-2)-2(y-2)
nw it is (y-2)(y-2)
that is
(y-2)^2

Answer 3

y = tanx

Answer 4

put y = tan x

Answer 5

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