Question

Three forces 9, 12 and 15 N acting at a point are in equilibrium. The angle between 9 N and 15 N is
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Answer 1

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Answer 2

Explanation:

9^2 + 12 ^ 2 = 15 ^2

So angle between 9 and 12 is 90 °

angle between 9 and 15 is θ

Cos θ = 9/15

θ = 53.1 °