3 years ago

I’m looking for a girl friend;)

Mathematics

2 answers:

tiny-mole [99]3 years ago

5 0

Answer:

shouldnt ask this on a site where you ask questions for school mate

Step-by-step explanation:

il63 [147K]3 years ago

3 0

Answer:

Wsp

Step-by-step explanation:

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3 years ago

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elena55 [62]

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tigry1 [53]

| u | = √(2² + (-1²)) = √5
| v | = √ ( 1² + (-8)² = √65
cos (u,v) = ( u * v ) / (| u | * | v |) =
(2 * 1 + ( -1 ) * ( - 8 )) / √5 √ 65 = (2 + 8) / √5 √65 = 10 / (√5 √ 65 )
The length of a larger diagonal:
d 1² = | u |² + 2 |u| |v| + | v |² = 5 + (2 √5 √65 * 10 / √5 √65 )+65
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d 2 = √50 = 5√2
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The lengths of the diagonals are: 3√10 and 5√2 .

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