3 65 7.Secnario-1: cos" + sin +cos ec 13 5 16 Secnario-2: f(x)= tan x. 1-x² a) Show that 2 tanx = cos 1+x² b) Show that the value of scenario-1 will be c) From scenario-2, find the solution of f(x) + f(2x)+ f(3x) = f(x).f(2x).f (3x), when 0 < x < 2n. ド一2

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