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You can use 2 methods:

1. Use Pythagoras:

For a 30/60/90 triangle the short side is half of the hypotenuse = 4.9

Then 9.82 - 4.92 = (third side)2 = 8.487

or

2. Use trigs:

Sin 30o x 9.8 = opposite side = 4.9

Cos 30o x 9.8 = adjacent side = 8.487

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12y ago

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