Why is the derivative of theta 1 and not 0. Isn't theta a number?

Question

unklerhaukus · Answer

theta might be a variable

anonymous · Answer

Why is theta a variable? Wouldn't tan theta --> theta be a number in radians?

ganeshie8 · Answer

if $\theta  $ is a number/constant,

$\large \frac{d}{dx}(\theta) = 0$

ganeshie8 · Answer

if $\theta$ is a variable,

$\large \frac{d}{d\theta}(\theta) = 1$

anonymous · Answer

So is theta a variable or number/constant?

parthkohli · Answer

Theta is just like x. Is x a number? You decide.

unklerhaukus · Answer

theta usually represents an angle, 
if you are taking the derivative of the tangent of theta , you are trying to find the slope of that line for all possible angles theta

agent0smith · Answer

x is a number. y is a number. But they're variables, not constants.

anonymous · Answer

What is NDER to support computations of derivatives?