# Find dt/dtheta

1. Jun 12, 2012

### aaaa202

How do I most easily find dt/dθ, when they are related by the following equation:

t2-1 = 2√(z2-1)exp(iθ)(z+√(z2-1)cosθ)

and t = z + √(z2-1)exp(iθ)

I could find t and then differentiate, but with all the square roots it's gonna be a mess. Also my teacher seemed to think it was easy, so therefore I ask what else can be done in a situation like this.

Thanks

2. Jun 12, 2012

### HallsofIvy

Staff Emeritus
I'm not clear what you mean here. You have two different equations defining s as a function of $\theta$ (I presume z is to be treated as a constant.). And they are NOT equivalent.

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