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Grade 12th passWave Motion

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Medical Student

7 Years agoGrade 12th pass

1 Answer

Khimraj

Approved Tutor Answer7 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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