Question

(tan(theta)-1)(cos(theta)+1)=0
on interval 0<=theta<=2pi

Answer 1

\[(\tan(\theta)-1)(\cos(\theta)+1)=0\]

Answer 2

\[
(\tan(\theta)-1) = 0 ~~\text{ or } ~~ (\cos(\theta)+1)=0
\]

Answer 3

a * b = 0 means either a = 0 or b = 0

similarly