sin x + cos x = √2 * sin (x + Pi/4)及相关三角函数定理
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sin x + cos x = √2 * sin (x + Pi/4)及相关三角函数定理
sin x + cos x = √2 * sin (x + Pi/4)
及相关三角函数定理
sin x + cos x = √2 * sin (x + Pi/4)及相关三角函数定理
sinx+cosx=√2*(sinx*cos(pi/4)+cosx*sin(pi/4))=√2 * sin (x + Pi/4)
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sin x + cos x = √2 * sin (x + Pi/4)及相关三角函数定理
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