1.

Find the general solution of tan 2θ tan θ = 1.

Answer»

Given, tan 2θ tanθ = 1

⇒ \(\frac{ 2\,tan\theta}{1-tan^2\theta}\) . tanq =1 

⇒ \(\frac{ 2\,tan\theta}{1-tan^2\theta}\) =1 

⇒2 tan2 θ= 1− tan2 θ

⇒ 3 tanθ = 1 

⇒ tanθ = \(\frac{1}{3}\) 

⇒ tanθ = ( \(\frac{1}{\sqrt{3}}\) )2 = tan2 \(\frac{π}{6}\) 

⇒ θ = nπ ±  \(\frac{π}{6}\)



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