Feedback for Exam 2- MTH 2410- W15.txt
The equation cos(x)=0 has infinitely many solutions because cos(x) is periodic.
You can find the solutions in the interval [0,2*pi] and the rest are translations of these solutions. In particular, cos(x)=0 and x in [0,2*pi], implies x=pi/2 or x=3pi/2. All solutions have the form
x=pi/2+2*pi*k, or x=3pi/2+2*pi*k, where k is any integer number.