计算锐角三角函数(1)sin^2 30度+cos^2 30度=____+_____=_____(2)sin^2 45度+cos^2 45度=_____+_____=_____(3)sin^2 60度+cos^2 60度=_____+____=___猜想:当角A为锐角时,sin^2A+cos^2 A=_____
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![计算锐角三角函数(1)sin^2 30度+cos^2 30度=____+_____=_____(2)sin^2 45度+cos^2 45度=_____+_____=_____(3)sin^2 60度+cos^2 60度=_____+____=___猜想:当角A为锐角时,sin^2A+cos^2 A=_____](/uploads/image/z/2529796-4-6.jpg?t=%E8%AE%A1%E7%AE%97%E9%94%90%E8%A7%92%E4%B8%89%E8%A7%92%E5%87%BD%E6%95%B0%EF%BC%881%EF%BC%89sin%5E2+30%E5%BA%A6%2Bcos%5E2+30%E5%BA%A6%3D____%2B_____%3D_____%282%29sin%5E2+45%E5%BA%A6%2Bcos%5E2+45%E5%BA%A6%3D_____%2B_____%3D_____%283%29sin%5E2+60%E5%BA%A6%2Bcos%5E2+60%E5%BA%A6%3D_____%2B____%3D___%E7%8C%9C%E6%83%B3%EF%BC%9A%E5%BD%93%E8%A7%92A%E4%B8%BA%E9%94%90%E8%A7%92%E6%97%B6%2Csin%5E2A%2Bcos%5E2+A%3D_____)
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