A reciprocal is the number that is in front of a variable. If it is just the plain variable, it's reciprocal is 1. (Ex. 10x has a reciprocal of 10. 7y has a reciprocal of 7. Sorry if I didn't understand your question, are you looking for a vocabulary word?
Answer:
Sin195* = -
Cos195* = - 
Step-by-step explanation:
Cot=cos/sin
so, it becomes sin^2+cos^2=1
that proves it
The angles are complementary.