Tan (x-y) + tan y
_____________ : tan x
1-tan (x-y) tan y
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1 is the answer of the question
tan(A+B)=tanA+tanB/1-tanAtanb
substituting the values in the equation
tan( x-y+y)=tanx
tanx:tanx=1
tan(A+B)=tanA+tanB/1-tanAtanb
substituting the values in the equation
tan( x-y+y)=tanx
tanx:tanx=1
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