# If tan A = .3 and A is in Q1, how do you go about finding sin A and cos A?

If $\tan \left(A\right) = 0.3$ and $A$ is in Q1
(ignore the fact that the image below uses $x$ instead of $A$
$\sin \left(A\right) = \frac{3}{\sqrt{109}}$
$\cos \left(A\right) = \frac{10}{\sqrt{109}}$