Question

What is the value of `cot(-315^@)`?

Answer 1

`cot(-315^o)=1`

Explanation:

As `cot(-A)=-cotA`

`cot(-315^o)=-cot315^o=-cot(360^o-45^o)`

= `-cot(-45^o)=-(-cot45^o)=cot45^o`

But `cot45^o=1`

Hence `cot(-315^o)=1`