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Mathematics 7 Online
OpenStudy (anonymous):

please help An observer (O) spots a plane flying at a 35° angle to his horizontal line of sight. If the plane is flying at an altitude of 17,000 ft., what is the distance (x) from the plane (P) to the observer (O)? A right triangle is shown with one angle marked 35 degrees, one side marked x and the height marked 17000 feet. 20,757 feet 24,251 feet 29,639 feet 31,262 feet

OpenStudy (anonymous):

OpenStudy (anonymous):

What two sides of the triangle are you given?

OpenStudy (anonymous):

*in terms of the 35 degree angle?

OpenStudy (anonymous):

The 3 sides are: opposite, adjacent and hypotenuse

OpenStudy (anonymous):

wait so there's no answer ? @larryboxaplenty

OpenStudy (anonymous):

You left soI figured that you went elsewhere

OpenStudy (anonymous):

They give you the hypotenuse and opposite side in terms of the 35 degrees. What trig function uses the those two sides?

OpenStudy (anonymous):

sin, cos, or tan?

OpenStudy (anonymous):

no my computer was acting up sorry

OpenStudy (anonymous):

Do you know?

OpenStudy (anonymous):

idk but this is the picture

OpenStudy (anonymous):

It's Sin. Sinx = Opposite/Hypotenuse. Therefore: Sin(35 degrees) = 17000/x

OpenStudy (anonymous):

Can you solve for x from here?

OpenStudy (anonymous):

is it C ? im really not good at this

OpenStudy (anonymous):

OpenStudy (anonymous):

Here is the work, look it over :) I colored coded it to show you each step

OpenStudy (anonymous):

Yes, it is C, check the picture to check

OpenStudy (anonymous):

yay i did it right thanks (:

OpenStudy (anonymous):

anytime :)

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