+223 In \(\triangle XYZ\), we have \(\angle X = 90^\circ\) and \(\tan Z = 3\). What is \(\cos Z\)?
Answer with an exact number
+23252 Since tan = opposite / adjacent -- If the tan(Z) = 3 = 3/1
---> opposite = 3 (or a multiple thereof) and adjacent = 1 (or the same multiple thereof)
This means that the hypotenuse is: h2 = 32 + 12 = 10
---> hypotenuse = sqrt(10) (or the same multiple thereof)
cos(Z) = adjacent / hypotenuse = 1 / sqrt(10)
+169 I got the same thing!
\(\frac{1}{\sqrt{10}}\)
Nice work! I guess you have that many upvotes for a reason 
