If $\cos A = \dfrac{1}{3}$ and $\cos A,\ \sin A$ have the same sign, then $\sin A$ equals —

Question

Accepted Answer

$\dfrac{2\sqrt{2}}{3}$

Answer

$-\dfrac{2\sqrt{2}}{3}$

Answer

$\dfrac{1}{\sqrt{3}}$

Answer

$-\dfrac{1}{\sqrt{3}}$

If cos⁡A=13\cos A = \dfrac{1}{3}cosA=31​ and cos⁡A, sin⁡A\cos A,\ \sin AcosA, sinA have the same sign, then sin⁡A\sin AsinA equals —