its the cosine.. thanks to the dude up there i got it wrong and that was my answer for 4.1.3.
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Yes... opposite an angle of a right triangle to the length of the triangle's hypotenuse.
Its Tangent, APEX "The tangent of an angle is the ratio of the opposite leg length to the adjacent leg length."
1:1 since the two legs are the same size. The ratio between either leg and the hypotenuse is 1:(square root of 2)
2 Square Root 3 And 4
Use the sine ratio: sine 30 degrees = opposite/hypotenuse Then: opposite = 2*sine 30 degrees Answer: 1 foot