<h2>Hello!</h2>
The answer is: True.
<h2>Why?</h2>A counterexample is a way that we can prove that something is not true about a mathematical expression or equation, it could be considered as an exception to a rule, so to check if the answer is true or false, we must prove that a counterexample of the given expression is 0°, so:
The given expression is:
Then,
We can see that the equation is not fulfilled, so 0° is a counterexample of and the answer is true.
Have a nice day!