CMS of LHC (CERN) has just reported new Electroweak precision measurements {(**sin****(****θ), lepton/eff)^2 ****= ****0.23101****±****0.00052}** on November 14, 2017, see https://arxiv.org/abs/1711.05288 .

In Standard Model, Weinberg angle is a function of two more fundamental physical constants: weak isospin g and weak hypercharge g’, and they are all ‘free parameters’ (not derived theoretically).

On the other hand, the Weinberg angle was calculated theoretically in G-theory, see http://prebabel.blogspot.com/2011/10/theoretical-calculation-of-cabibbo-and.html or page 36 of ‘Super Unified Theory”.

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In fact, the Weinberg angle (*θ*_{W }) is precisely defined by the equation (10), page 37 of ‘Super Unified Theory”, as follows.

** Sin (Δ θ1) = Sin^2 (**Δ θ2) = (**Sin^2 ** Δ θ3) ^2 = (**Sin^3 **Δ θ4) ^3

= (**Sin^6 **Δ θ5) ^6 = (**Sin^64 **Δ θ6) ^64 ……. Equation (10)

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** Sin (**Δ θ1) = Sin {A (1) – 3 (A (0)/24}

= Sin {Cabibbo angle (θ_{c})) – 3 (A (0)/24} = 0.23067

**Sin^2 (**Δ θ2 = 28.75°; Weinberg angle (*θ*_{W})) = 0.2313502

Δ θ2 = 28.75° (Weinberg angle (*θ*_{W }))

{**Sin (**Δ θ1) + **Sin^2 (**Δ θ2)}/2 = **0.2310**

All Δ θn are mixing angles.