Find the possible values of tan x, if cos2x + 5 sin x. cos x = 3.​

1 thought on “Find the possible values of tan x, if cos2x + 5 sin x. cos x = 3.​”

1. 2Cosx^2 -1+ 5SinxCosx = 3

   2Cosx^2 + 5SinxCosx = 4(Cosx^2 +Sinx^2)

   2Cosx^2 – 5SinxCosx + 4Sinx^2 = 0

   4tanx^2 – 5tanx +2 =0

   roots are answer

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