Recent content by alexhenderson

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    Is It Possible for a 9th Grader to Learn Calculus?

    Hey Willis, This is coming from a ninth grader as well, but don't take my word. I began taking Algebra I in the 7th grade, and then taking geometry in the 8th grade. And I can say understanding basic calculus was tangible for me near the end of the 8th grade. I used resources such as...
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    Schools Worried about my GPA in high school, .

    Hey, I am a freshman attending high school, and I really enjoy physics to the point where I want to major in it, and I have been practicing the mathematics and kinematics of it for a while now. I will have a 3.2-3.4 GPA for the first semester of high school, and I was wondering if that...
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    Studying What textbooks should I consider for my upcoming birthday?

    Hello Physicsforums, Some of you may know me from my previous thread "how to thrive at an early age" and I have made much progress. Techniques of integration, differentiation, Newtonian dynamics, functions and limits, energy physics. I am also working on a system of trying to theoretically...
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    Finding the Rescue Direction for a Plane Emergency Landing

    I drew a sketch and I got 19 degrees south of east.
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    Finding the Rescue Direction for a Plane Emergency Landing

    I am doing those methods, but I think I am miscalculating, I did the square root sum of squares and got 329.5 km, then I did -107.3/311.5(arctan) and got 19 degrees.
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    Finding the Rescue Direction for a Plane Emergency Landing

    292.4km 49 degrees south east? I did the Ry/Rx(arctan) and got 19 degrees and subtracted that from the 68 degrees.
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    Finding the Rescue Direction for a Plane Emergency Landing

    Ry= -13.2 so the magnitude is 217.2km, and would it be going 68 degrees east to the plane?
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    Finding the Rescue Direction for a Plane Emergency Landing

    Ry= -103.7km. And then if I change Ry, and then do the magnitude and Ry/Rx arctan would I get the right answer?
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    Finding the Rescue Direction for a Plane Emergency Landing

    Was my solution incorrect? Rather than forgetting the -171.
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    Finding the Rescue Direction for a Plane Emergency Landing

    Negative, yeah, I think that's the mistake.
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    Finding the Rescue Direction for a Plane Emergency Landing

    I'm thinking it would be +171.
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    Finding the Rescue Direction for a Plane Emergency Landing

    Homework Statement A plane leaves the airport in Galisteo and flies 170km at 68 degrees east of north. And then flies 230 km at 48 degrees south of east. It makes an emergency landing at it's pasture. When the airport sends out a rescue crew, in which direction and how far should they go to...
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    Derivative f(x)=x^3, f(a+h)-f(a)/h

    Ok, thank you.
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    Derivative f(x)=x^3, f(a+h)-f(a)/h

    http://img192.imageshack.us/f/derivative.jpg/" Can you check my math? Please.
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    Derivative f(x)=x^3, f(a+h)-f(a)/h

    I already know the derivative, so just simplifying the equation.
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