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Question Number 164599 by mathlove last updated on 19/Jan/22

$$180<\theta <270and$$ $$2sin\theta -\cos \theta =0$$ $$faindvolueof$$ $$\sin \theta \times \cos \theta =?$$

Commented bycortano1 last updated on 19/Jan/22

$$\tan \theta =\frac{1}{2}\to \{\begin{array}{l}\sin \theta =-\frac{1}{\sqrt{5}}\\ \cos \theta =-\frac{2}{\sqrt{5}}\end{array}$$ $$\cos \theta \times \sin \theta =\frac{2}{5}$$

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