tan a- tan b =x and cot b -cot a=y then cot (a-b) = ?
viraj ravikiran patil , 7 Years ago
Grade 10
Trigonometry> tan a- tan b =x and cot b -cot a=y then c...
1 AnswersShailendra Kumar Sharma
Last Activity: 7 Years ago
cotb-cota=y
1/tanb-1/tana=y
(tana-tanb)/tanatanb=y
tanatanb=x/y
cot(a-b)=(1+tanatanb)/(tana-tanb)
=(1+x/y)/x
=(x+y)/xy
1/tanb-1/tana=y
(tana-tanb)/tanatanb=y
tanatanb=x/y
cot(a-b)=(1+tanatanb)/(tana-tanb)
=(1+x/y)/x
=(x+y)/xy
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