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Question Number 194697 by cortano12 last updated on 13/Jul/23

$$\underbrace{}$$

Answered by MM42 last updated on 13/Jul/23

$$\frac{tanx-tan3x}{tanx}=3\Rightarrow \frac{tan3x}{tanx}=-2$$$$\frac{cotx}{cotx+cot3x}=\frac{tan3x}{tanx+tan3x}$$$$=\frac{-2}{1-2}=2✓$$

Answered by Frix last updated on 13/Jul/23

$$\frac{a}{a-b}=\frac{1}{3}\Rightarrow b=-2a$$$$\frac{\frac{1}{a}}{\frac{1}{a}+\frac{1}{b}}=2$$

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