Question: If (1 + i. x/a)(1 + i. x/b)(1 + i.x/c )........ = A+iB, prove that (1 +x^2/a^2 )(1 + x^2/b^2)(1+ x^2/c^2) = A^2 +

If (1 + i. x/a)(1 + i. x/b)(1 + i.x/c )........ =

If (1 + i. x/a)(1 + i. x/b)(1 + i.x/c )........ = A+iB, prove that (1 +x^2/a^2 )(1 + x^2/b^2)(1+ x^2/c^2) = A^2 + B^2. (ii) tan-! + tan / + tan x a -1 x 11 = A + B = tan-1 B A

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