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February 27, 2015

February 27, 2015

Posted by **STEPHANIE** on Wednesday, September 28, 2011 at 5:10pm.

A guy wire is attached to the top of a radio antenna and to a point on horizontal ground that is 30.0 meters from the base of the antenna. If the wire makes an angle of 55°10' with the ground, approximate the length l of the wire. (Round your answer to the nearest tenth.)

A rocket is fired at sea level and climbs at a constant angle of 65° through a distance of 20,000 feet. Approximate its altitude to the nearest foot.

- I NEED HELP!!!!!MATH!!! -
**Steve**, Wednesday, September 28, 2011 at 11:57pmEach of these involves drawing a triangle with its base parallel to the ground, with a given angle. Then, either a side or the hypotenuse is given. If b is the base and h is the height, c is the hypotenuse, and a is the angle

tan(a) = h/b

cos(a) = b/c

sin(a) = h/c

For example, in the first problem,

(h-4)/700 = sin(60°)

In the second,

30/L = cos(55°10')

In the third,

h/20000 = sin(65°)

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