Given sin θ 2 + cos θ 2 = 233, then the value of sin θ is______ The value of Cos2 θ is______ .

Given sin θ 2 + cos θ 2 = 233, then the value of sin θ is______ The value of Cos2 θ is______ .

Analysis: from sin θ 2 + cos θ 2 = 233, 1 + sin θ = 43, sin θ = 13, Cos2 θ = 1-2, sin 2 θ = 1-2 · 19 = 79