-苹 multiplica 彷?z衝 rotates a vector x in the xy-plane
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47? Explain yougr劑
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Cfon of (g,2,c) 45. Find the St AA for the lin
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46. nd 負e standard matrix A for the linear transtformation
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47. _Let x) be a nonZero column vector in 及, and suppose that
7了: 和一和 is the transformation defined by the formula
