Answer:
=-
=
.
Step-by-step explanation:
Given, let
be the angle in the III quadrant .
=-
...... (given)
In III quadrant
is negative and
is positive .
because ,
=reciprocal of 
it means ,
=
Therefore, first we find value of 
We know that

∴ 




<h3> Because

lies in III quadrant and in III quadrant it is negative.</h3>
Now, we know that

therefore, first we find 




<h3>Because it lies in III quadrant, therefore it take positive.</h3>
Hence,
and 