Alright, so:
2. Homework Equations
sin (2x) = 2sin(x)cos(x)
cos (2x) = cos^2(x)-sin^2(x)
3. The Attempt at a Solution
Sin (2x) / (1+cos(2x))
= (2sin(x)cos(x)) / (1+cos^2(x)-sin^2(x))
= 2 / (1+cos(x)-sin(x))
= 2sec(x)-csc(x)
= sec(2x)-csc(x)
This seems right, but it doesn't fit with...
alright, I have one more question.
1. Homework Statement
By using known trig identities, sin(2x)/(1+cos(2x)) can be written as:
A) tan(2x)
B) tan(x)
C) csc(2x)
D) sec(x)
E) all of the above
F) none of the above
2. Homework Equations
cos x = sin x/cos x
3. The Attempt at a Solution...
Accidently close the window before I finished my attempted solution. I can see how it is solved by simply guessing and checking, but not using actual algebra. If I put q=120-(q/2) into the form in the book, it is q=(240-q)/2. Here I can see that the answer is 2/3 of 240/2(1). In other words...
Homework Statement
I have to solve this algebra equation for an economics class. The equation I must solve is q=120-(q/2). I could solve this by guessing but I need to figure out the algebra behind it.
Homework Equations
The book gives this equation. Y=(a-bY)/2b and solves it for Y...