Use a graphing calculator to test whether the following is an identity. If it is an identity, verify it. If it is not an identity, find a value of x for which both sides are defined but not equal.
The Attempt at a Solution
Ok, plug in the left side for y1, right side for y2, obviously not an identity. The second part where it ask for a x value is where Im having trouble. I thought maybe simplify the left hand side and find a value for whatever that is that equals 1..
Factor out to get
ok so now I have 1-sin(x)=1
so find the value where -sin(x)=0??
The teachers answer is - Not an identity, x=[tex]\pi/4[/tex]
Im clueless about the second part I guess..