Question

Find all solutions of the equation. (Enter your answer in the form a + bπn, where a [0, 2π), b is the smallest possible positive number, and n represents any integer. Round a to four decimal places.) cos(x)=-1

Answer 1

cos(x)=-1
thus x=arccos (-1)=180=π
also, cos(x)=-1 when:
x=π,3π,5π,......
The above is a sequence that can be modeled by:
xn=(2π+nπ)
where, n=1,3,5,....(set of all odd numbers)