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Question Number 157452 by tounghoungko last updated on 23/Oct/21

 solve tan x=cos 3x

$$\:{solve}\:\mathrm{tan}\:{x}=\mathrm{cos}\:\mathrm{3}{x}\: \\ $$

Commented by MJS_new last updated on 23/Oct/21

no useable exact solution possible ⇒ you  must approximate

$$\mathrm{no}\:\mathrm{useable}\:\mathrm{exact}\:\mathrm{solution}\:\mathrm{possible}\:\Rightarrow\:\mathrm{you} \\ $$$$\mathrm{must}\:\mathrm{approximate} \\ $$

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