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1 wanna compelete solution....................... ... ......... .................................................

1 wanna compelete solution....................... ... ......... .................................................

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Grade:12th pass

1 Answers

Khimraj
3007 Points
5 years ago
F1 = 3(cos30\hat{i} + sin30\hat{j})
F2 = 4(cos120\hat{i} + sin120\hat{j})
Then
F1.F2 = 12(cos30*cos120 + sin30*sin120) = 3(\sqrt{3}*(-1) + 1*\sqrt{3}) = 0
HOPE IT CLEARS.

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