86. If
tan A-tan B =x and cot B-cotA=y,
then what is cot(A - B) equal to?
Answers
Answered by
6
Answer:
x+y.
Step-by-step explanation:
We know,cot(A-B)=(cotAcotB+1)/cotB-cotA
here,tanA-tanB=x
=>(cotB-cotA)/cotAcotB=x
=>cotAcotB=x/y
Now,cot(A-B)=(x/y+1)/y={(x+y)/y}/y=x+y.
I think it is correct. I am not sure.
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