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Question Number 39395 by Rio Mike last updated on 06/Jul/18

$$Giventhat\theta isanobtuse$$$$anglefindtan\theta if$$$$cos\theta =\frac{3}{5}$$$$$$

Commented by MrW3 last updated on 06/Jul/18

$$thequestionisnotoksir.$$$$if\theta isanobtuseanglethen\cos \theta <0.$$$$$$$${let}^{\prime }sassume\cos \theta =-\frac{3}{5}$$$$\Rightarrow \sin \theta =\frac{4}{5}$$$$\Rightarrow \tan \theta =-\frac{4}{3}$$

Commented by Rio Mike last updated on 06/Jul/18

$$ithinkyourright..thanks$$

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