/sci/ - Science & Math

>>1858446
pic not related, since it's the wrong pic anyways

bump? come on SOMEBODY must be good at trig

>>1858451
>>1858446
this was my pic related

help? somebody

anybody else?
basically i need to find "use the equations to determine how long it takes you to reach the buoy"
the equations (parametric) are:
x=0.032t
y=0.699t
velocity is 0.7 feet per second
angle theta is 87.3 degrees
i can show you the triangle on video

bump

of for fuck...

SOMEBODY must know trig?

guys: i will show you how to make 2+2 equal 5? ik its lame but i need these answers

Sure we know trig, but nobody wants to help for two reasons.
a) Trigonometry is fugly. The calculations are fugly, and even the nicest results are fugly.
b) There is no challenge in doing that stuff. It's not interesting, it's just stringy calculation all day long.

>>1858562
i am aware that the calculations look annoying and the formulas and shit are ridiculous
i know it's not a challenge for you guys, but i am stuck.

>>1858583
Here's what I'd be doing: break everything down to sin and cos, smash them together, and when everything's short see which special trig functions you can identify again.

>>1858601
there is nothing to break down at the point i am at
i have both of my parametric equations, now i need to determine how long it takes to get to a set point

for christ sake somebody just give me help with this? it'll probably take like not even 5 minutes

>>1858502
this isn't even trig. y = 0.699/0.032 x. That's the line you are traveling on, and you are going 0.7 ft per second. Where is the buoy?

>>1858656
the parametrics to set this up are trig.
how is this the line you are traveling on? explain?

>>1858656
>>1858670
ignore that. i understand.
it is a slope-intercept equation, but there is no intercept

>>1858670
no i will not explain because you are stupid. a stupid idiot

>>1858677
mouth traveled faster than brain.
even if you have the equation for the line, it is in terms of x. so what if the velocity is 0.7? you need the t value (time to get to the buoy)
i dont see how this equation helps

>>1858685
YOU'RE A BAKA

>>1858656
the buoy is 2640 ft. directly offshore (not the line of y=21.84x) and 100 ft away from the origin (where said line begins)

to the last person: it's for test prep not homework, it is taken from the book, but was never assigned.
i can get all the other assigned ones, just not this one. not sure what the difference is

>>1858727
Oh, I was just makin' sure. Is this just for high school calc?

>>1858744
yeah basically.
like i said, i can get it using d=rt (r=vt)
but i dont know how to find it using parametrics

bump. still looking for help

Post the full original problem and I will give you a detailed written up answer

>>1858909
"you are swimming in a race across a lake and back. swimmers must swim to, and then back from, a buoy placed 2640ft. from the center of the start/finish line. you start the race 100ft from the center of the start/finish line as shown.
/
/ |
/ | 2640ft
/ |
/ __ |
100ft

a. you swim to the buoy at a steady rate of 0.7 foot per second. Write a set of parametric equations for your path (i got this part)
b. Use the equation to determine how long it takes you to reach the buoy
c. If you continue to swim at a stteady rate of 0.7 foot per second straight back to the center of the start/finish line, how long will it take for you to complete the race?

>mfw part b

>>1858936
Im uploading the work right now.

>>1858983
>>1858936

Just as a note, I calculated theta in radians, not degrees.