B) .
Step-by-step explanation:
We have to find out the reciprocal of .
We have drawn a triangle for your reference.
In which
AB = opposite side
BC = adjacent side
CA = hypotenuse
Since we know that the is equal to opposite side upon adjacent side.
Or
Where as the is equal to adjacent side upon opposite side.
Therefore,
Or
From equation 1 and equation 2 we can say that;
Hence .