Question

Required step by step solution.​

Answer 1

Step-by-step explanation:

cot(A-B) = (cotAcotB + 1) / (cotB-cotA)

= (cotAcotB + 1)/y

from given tanA - tanB = x

1/cotA - 1/cotB = x

cotB - cotA = xcotAcotB

cotAcotB = y/x

put in equation

= (y/x + 1)/y

= ((x+y)/x)/y

= x+y/xy

Answer 2

Answer:

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