tan30+tan90/1-tan30tan90
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hi I give you answer......
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(tanA+tanB)/(1-tanAtanB) = tan(A+B)
(tan30+tan90)/(1-tan30tan90) = tan(30+90)
= tan120
(tan30+tan90)/(1-tan30tan90) = tan(30+90)
= tan120
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