MathematicsMedium178×since 2002Q5178If sin⁴α\alphaα + 4 cos⁴β\betaβ + 2 = 42\sqrt 22 sin α\alphaα cos β\betaβ; α\alphaα, β\betaβ ∈\in∈ [0, π\piπ], then cos(α\alphaα + β\betaβ) −-− cos(α\alphaα −-− β\betaβ) is equal to :A−2- \sqrt 2−2B0C−-− 1D2\sqrt 22Check answerSkip