If tan(A-30^∘)=2-√(3), then find A (a) π^c/2 (b) π^c/4 (c) π^c/6 (d) π^c/3

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If tan(A-30^∘)=2-√(3), then find A
(a) π^c/2
(b) π^c/4
(c) π^c/6
(d) π^c/3

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