Question

Find te value of `csc^(-1)(-2)`?

Answer 1

`csc^(-1)(-2)=-pi/6`

Explanation:

Let `csc^(-1)(-2)=A`

then `cscA=-2`

or `1/sinA=-2`

or `sinA=-1/2=sin(-pi/6)`

i.e. `A=-pi/6`

Hence `csc^(-1)(-2)=-pi/6`