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Please solve the questions number is 21. Hurry up now.

Please solve the questions number is 21. Hurry up now.

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Grade:12th pass

1 Answers

Khimraj
3007 Points
6 years ago
|a| =10, |b| = 2
a.b = 12
|a||b|cos\Theta = 12
cos\Theta = 12/20 = 3/5
So sin\Theta = (1 – cos\Theta)1/2 = 4/5
Then |axb| = |a||b|sin\Theta = (10)(2)(4/5) = 16.
Hope it clears. If you liike answer then please approve it.

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