What is p divided by r equal to?
tan xº
tan yº
sin yº
cos xo

P/R=Perpendicular/Base for x°= Base/Perpendicular for y°

= Tan x°

The answer is  (a) this is not an exponential function because there is no variable in the exponent position.if you look at the given function    the variable, x, is not in the exponent position.e is just a constant, euler's number. it's just like  π. it is not a variable.