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Grade: 12th pass
        
1 wanna compelete solution....................... ... ......... .................................................
10 months ago

Answers : (1)

Khimraj
2788 Points
							
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.
10 months ago
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