Question

SinA:=4/5

SinB=5/13
Find
Cot (A-B) = ?
explain clearly and provide short cut formula if possible this was asked in railway ntpc​

Answer 1

sin A=4/5

sin A=P/H

P/H=4/5

B=3

cotA=B/P

=3/4

sin B=5/13

Similarly, B=12

cot B=12/5

cot A- cot B=3/4-12/5

=(15-48)/20

=33/20