what is x for tanx=2/3
You don't specify if in degrees or radians, so I will do it degrees.
set your calculator to D ( find a DRG key)
enter:
2÷3=
2ndF tan
=
you should get 33.69°
That is the "angle instandard position", the one in the first quadrant.
By the CAST rule, the tangent is positive in I and III
So a second answer is 180+33.69 or 213.69°
The basic tanx function has a period of 180° (π radians), so adding/subtracting 180 to any answer will product new answers.