Question

2x^2 = 2 + y

Answer 1

what you want?

Answer 2

simply it. would I get like xy=?

Answer 3

I'm trying to do 2sin^2 = 2 + cos but I tried to do the algebraic form first.

Answer 4

you want yx=?
are you sure?

Answer 5

well what I really need is 2sin^2 = 2 + cos

Answer 6

your first equation is
2sin^2 = 2 + cos
??!

Answer 7

it is very different
because very relations between sin and cos are identifed

Answer 8

yeah but i was trying to see if it worked cause for other problems if I work it the algebraic way it will work with the precalculus.

Answer 9

:)) very funny

Answer 10

hey that's what my teacher told us to do if we had any problems! :P

Answer 11

So can you help me with this problem?

Answer 12

probably your teacher mentioned to an especial kind of problems.

Answer 13

nope

Answer 14

for example 1=sin^2 +cos^2
and you can get
2sin^2 = 2 + cos
2sin^2 = (1) +1 + cos
2sin^2 = (sin^2 +cos^2) +1 + cos
sin^2 = cos^2 +1 + cos

Answer 15

or use
http://upload.wikimedia.org/math/7/0/7/707415edba7cf845f7fafbf0cc95e23e.png

Answer 16

relation are in:
http://en.wikipedia.org/wiki/Cosine#Sine.2C_cosine.2C_and_tangent

Answer 17

a. 2sin^2 = (1) +1 + cos
b. 2sin^2 = (sin^2 +cos^2) +1 + cos

How did you get from a to b?

Answer 18

This is all so confusing. You know what? Nevermind all this. Thanks for trying to help! Really appreciate it. :)

Answer 19

by this formula:
1=sin^2 +cos^2
and replaced it on
2sin^2 = (1) +1 + cos
(replace 1 on the parenthes by 1=sin^2 +cos^2)
get
2sin^2 = (sin^2 +cos^2) +1 + cos

Answer 20

some of the relation you can easily obtain by replacing
1 by
http://upload.wikimedia.org/math/7/0/7/707415edba7cf845f7fafbf0cc95e23e.png
and simplification

Answer 21

another relation obtain:
cos(x)+cos(2x)+1=0

Answer 22

okay, yeah I understand that but then in sin^2 = cos^2 +1 + cos how do you add cos^2 + cos?

Answer 23

sorry i will be go, bye

Answer 24

okay, thank you, bye :)