1.设函数f(x)=向量a*向量b,其中向量a=(cos(x/2),sin(x/2)),(x属于R)向量b=(cosφ,sinφ)(φ的绝对值
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![1.设函数f(x)=向量a*向量b,其中向量a=(cos(x/2),sin(x/2)),(x属于R)向量b=(cosφ,sinφ)(φ的绝对值](/uploads/image/z/3975352-16-2.jpg?t=1.%E8%AE%BE%E5%87%BD%E6%95%B0f%28x%29%3D%E5%90%91%E9%87%8Fa%2A%E5%90%91%E9%87%8Fb%2C%E5%85%B6%E4%B8%AD%E5%90%91%E9%87%8Fa%3D%28cos%28x%2F2%29%2Csin%28x%2F2%29%29%2C%28x%E5%B1%9E%E4%BA%8ER%29%E5%90%91%E9%87%8Fb%3D%28cos%CF%86%2Csin%CF%86%29%28%CF%86%E7%9A%84%E7%BB%9D%E5%AF%B9%E5%80%BC)
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