Recent content by dare2dream

That's all the my book explains...so it's not all that helpful. Our teacher isn't that helpful either. =S If you can do it another way and get the same answer, that's good enough that I'll leave my work how it is...

Yes, I read the link. I found the equations by an example in my math book. This is the example: Kevin hits a baseball at 3ft above the ground with an initial speed of 150ft/sec at an angle of 18 degrees with the horizontal. Will the ball clear a 20-ft wall that is 400 ft away? The path of...

I still don't know if that's right or what to do/how to fix it if it's wrong...

That's gravity...or something. There was a similar example my math book and I just substituted the different angle and velocity.

What are you talking about? I gave you the equations I used...

<.< I used my calculator with that information, guessed at different T values and found that when T was 2.4, it was the highest? I don't know what else to show you...

Homework Statement Estimate the maximum height reached by a baseball during its flight if it is thrown with a velocity of 81 feet per second at an angle of 75 degrees relative to level ground. The Attempt at a Solution I found an answer, but I don't know if I did it right so I guess I'm...

so r^2 (1 + 3sin^2 theta) = 4?

I think so...just show that x is the square root of 10 then.

Yeah, I remember that, but I don't know what to do with the 4 then.

So then you get r^2 (cos^2 theta + 4 sin^2 theta) = 4 I don't know how to simplify that.

Okay...well I don't know how to do that..>.>

I know that r^2 = x^2 + y^2 but I don't know how to use that because of the 4 in the equation. I've thought about this problem for a week and this is as far as I've gotten. -.- (This is an equation off a take-home test we received to do over spring break.) So r^2 = x^2 + y^2, x = rcos...

Homework Statement Find an equivalent equation in polar coordinates. Homework Equations x^2 + 4y^2 = 4 Anyone know how to do this? I don't remember how when it's an equation...=S My best guess is (rcos theta)^2 + 4(rsin theta)^2 = 4...but that's as far as I can get.