Question

trigo identities. proving!! help me with this.. please

Answer 1

wait..

Answer 2

:)

Answer 3

rsin theta = r^3cos^3 theta/ 2a - r costheta

Answer 4

i need to get the real answer which is 2a sin theta tan theta..

Answer 5

The left side may have to be r^2sin^2(theta) if this is derived from your previous problem.

Answer 6

yes yes

Answer 7

now im lost..

Answer 8

so what are the correct terms? the ones above are wrong?

Answer 9

r^2sin^2 theta = r^3cos^3 theta/ 2a - r costheta

Answer 10

Multiply throughout by (2a/r).
You will have a quadratic equation. Solve for r.

Answer 11

the a and r are throwing me, we never played with that in these equations.
cos^3 = 1-sin^2(theta)cos(theta)

Answer 12

actually this is a cartesian to polar conversion..

Answer 13

im backing out lol

Answer 14

Why don't you give the original problem here too.

Answer 15

what level of math do we see this in?

Answer 16

analytic geometry

Answer 17

y^2 = x^3 / 2a - x

Answer 18

I didnt see it in trig, ahh I haven't taken that.

Answer 19

and i need to derive r= 2a sin theta tan theta