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Mathematics 7 Online
OpenStudy (anonymous):

The figure shows a weather balloon at point P. A right triangle PQR is drawn with right angle at angle PRQ. Angle PQR is 35 degrees and QR is 6 miles in length. How high is the point P of the weather balloon from a point R on the ground?

OpenStudy (anonymous):

OpenStudy (anonymous):

@Hero

OpenStudy (anonymous):

@amistre64

OpenStudy (anonymous):

@ash2326 @Zarkon @thomaster

OpenStudy (anonymous):

please help

OpenStudy (anonymous):

@ash2326

hero (hero):

You can begin by starting with what you know. We can definitely begin with \[\tan \theta = \frac{\text{opp}}{\text{adj}}\] Since the legs of the triangle, sides RQ and RP are the sides of interest.

OpenStudy (anonymous):

right

hero (hero):

The given angle is 35 degrees the given adjacent side is 6 the opposite side is unknown, or \(x\) So that yields: \[\tan(35^{\circ}) = \frac{x}{6}\] Solving for \(x\) yields \[6\tan(35^{\circ}) = x\] Do you know what \(6\tan(35^{\circ})\) is equivalent to?

OpenStudy (anonymous):

i got 4.20124522926

hero (hero):

Right, but we want the equivalent answer choice.

hero (hero):

Remember, \(\tan(\theta) = \dfrac{1}{\cot(\theta)}\)

OpenStudy (anonymous):

so the answer is c?

OpenStudy (anonymous):

@Hero c?

OpenStudy (anonymous):

@Hero

OpenStudy (anonymous):

@Hero @Hero @Hero

hero (hero):

It's not c, sorry. Since you have your calculator, another option for you would be to calculate each of the given options and see which one gets you same value as 4.20124522926

OpenStudy (anonymous):

b?

OpenStudy (anonymous):

@Hero @Hero @Hero

hero (hero):

Yes, correct.

OpenStudy (anonymous):

yay! thank you

hero (hero):

The key thing to remember is \[\tan(\theta) = \dfrac{1}{\cot(\theta)}\]

OpenStudy (anonymous):

could you please help me with another question? @Hero

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