On the unit circle, where 0 less-than pi, when is tangent theta undefined?

How many roots does the graphed polynomial function have? 1-02

In right triangle xyz, the right angle is located at vertex y. the length of line segment xy is 12.4 cm. the length of line segment yz is 15.1 cm. which is the approximate measure of angle yzx? 34.8° 39.4° 50.6° 55.2°

0.75,1.75,2.75,3.75 is arithmetic or geometric?