- Identifythe properties of light waves?

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Account for the following :
(a) XeF2 has linear structure and not a bent structure.
(b) Phosphorus show marked tendency for Catenation.? If 8^n = 16^4 then A) Decide if sin^2(x) = (1+cos(x))(1-cos(x)) or not.
b) Decide if sin(2x) = sin(x) cos(x) is true or not. Please show work thanks.? Can someone help with the algebra question? Http://maleenhancementshop.info/testonix/?