tan (2 x 30°) = 2tan30°÷1- tan²30°
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Step-by-step explanation:
thats a general formula used that is
tan(A+B)= tanA+tanB
1-tanAtanB
therefore R.H.S= 2tan30°
1-tan^2 30°
= tan30° + tan30°
1- tan30° tan 30°
= tan(30°+30°)
= tan(2×30°)
= L.H.S
HENCE PROVED.
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