Question

when were the forces in the pair of pulling at right angles to each other for the values a = 2.9 which is a leg of right triangle and a value C = 4.2 which is a hypothesis find the length of the other leg be to the nearest

Answer 1

The Pythagorean theorem tells you the other leg is

... √(c² - a²) = √(4.2² -2.9²) = √9.23 ≈ 3.038 ≈ 3.0

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There is insufficient information to do anything with forces.