[Solved] If \\sin \\alpha + \\sin \\beta = \\frac{\\sqrt{2}}{\\sqrt{3}} and \\cos \\alpha + \\cos \\beta = \\frac{1}{\\sqrt{3}}, then the value of (20 \\cos (\\frac{\\alpha - \\beta}{2}))^{2} is_____ - - IPM Indore 2022