Page 800 - Elementary_Linear_Algebra_with_Applications_Anton__9_edition
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(b) Use the result in part (a) to obtain Formula 11.
Derive Formula 5.
19.
When and , Equation 7 gives
20.
Use these two equations to obtain trigonometric identities for ,, , and .
Use Formula 11 to show that
21.
Show that if , then .
22.
Show that Formula 6 is valid for negative integer exponents if .
23.
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