if cos theta = 2x/1+x^2 then tan theta = ?

Dear student
Given: cosθ=2x1+x2=BaseHypotenuseBy Pythagoras Theorem,Prependicular=Hypotenuse2-Base2=1+x22-2x2=1+x4+2x2-4x2=1+x4-2x2=1-x22=1-x2Therefore, tanθ=1-x22x
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