Hey guys,

So.. I have a trig identity/equation question from my correspondence book that I can't seem to find an answer for. Here it is:

62) Solve each equation for 0<x<2pi

c) sinx = square root (3) *cosx

This will turn into tan x= sqr root(3)

and it will give me x= (pi/3), (4*pi/3)

Now, the next question is

d) Explain why the trig equation in part (c) is not an identity.

Is this just asking the basics of why equations are not identities? Should I say that it is because the statement is true for certain values of x? or in the case of a trig equation, and infinite number of values of x?