Anxiety would mean if you're worrying about something or fearing something. So math anxiety would be feeling worried or scared about your ability to do math.
X + y = -15. Subtract x from both sides.
y = -x - 15. This is as far as we can go with the provided information.
Answer:
Given the expression: 
Let the value of the given expression in radians be 
then;

......[1]
We know the value of 
Substitute the given value in [1] we have;

Since, the value of
is 0, therefore, the value of
is in the form of:
; where n is the integer.
At n =0, 1 and 2, {Since, n is the integer}
Value of
and
therefore, the answer in radians either
or