Assertion (A): If $\sin A=\frac{1}{3}\left(0^{\circ}<A<90^{\circ}\right)$, then the value of $\cos \mathrm{A}$ is $\frac{2 \sqrt{2}}{3}$ Reason (R): For every angle $\theta, \sin ^{2} \theta+\cos ^{2} \theta=1$.

Explanation

The correct value of cos A can be found using the Pythagorean identity sin^2 A + cos^2 A = 1, but the given value of cos A is incorrect.