if tanA=1/11, tanB%5/6. show A+B = 45°
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A+B= π/4=45
tan(A+B)=tanA+tanB/1-tanAtanB
=5/6+1/11 ÷ 1- 5/6 x 1/11
=55+6/66 ÷ 1- 5/66
=61/66 ÷ 66-5/66
=61/66 ÷ 61/66
tan(A+B) =1 =tan 45
A+B = 45
A+B = π/4
tan(A+B)=tanA+tanB/1-tanAtanB
=5/6+1/11 ÷ 1- 5/6 x 1/11
=55+6/66 ÷ 1- 5/66
=61/66 ÷ 66-5/66
=61/66 ÷ 61/66
tan(A+B) =1 =tan 45
A+B = 45
A+B = π/4
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