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6 June, 19:55

A set of bleachers 20 feet long rises from the ground at an angle of 33°. what is the length of the bleachers along the ground? round to the nearest tenth.

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  1. 6 June, 21:08
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    Based on my understanding, 20 feet serves as the hypotenuse of the triangle created when the bleacher rises from the ground at an angle of 33°.

    sin θ = opposite / hypotenuse

    cos θ = adjacent / hypotenuse

    tan θ = opposite / adjacent

    sin 33° = opposite / 20 ft

    sin 33° x 20ft = opposite

    0.544 x 20 = opposite

    10.89 ft = opposite

    cos 33° = adjacent / hypotenuse

    cos 33° x 20 ft = adjacent

    0.839 x 20 = adjacent

    16.77 ft = adjacent

    I think the the length of the bleachers along the ground is the value of the adjacent which is 16.77 ft.
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