Question

Prove `-cot theta = tan (theta + pi/2)`?

Answer 1

Check out his answers...
https://socratic.org/questions/how-do-you-prove-tan-x-pi-2-cotx

Explanation:

I tried using the tan sum identity but didn't quite work out since `tan(pi/2)` is undefined, I also tried using tan co-function identity, but this was disproved, rather than proved as I ended up with
`tan(-pi/2+theta)= tan(theta+pi/2)`