No, dependent on skin tone.
Yes beige and tan are the same color.
tan(-x) = -tan(x)
No, white and tan are not the same colors. The links below show the difference between the colors.
yes..they are the same color
Yes. Both expressions are the same.
YES
The derivative of tan(x) is sec2(x).(Which is the same as 1/cos2(x).
No, correct usage would be "...everyone is not the same"; as in, "Aren't you glad that everyone is not the same?".
Everyone is happy when the sun comes up and the clouds fade away. When the sun shines in your face and you're getting a tan.
It doesn't have to be hot to tan. You can put on your bathing suit and tan in the snow, works just the same. It's all in the UV Rays. Or, fake tanning or tanning booths work too. :)
No, you can only tan from the sun or tannin beds.
If you mean on the stage...absolutely not. If you want your legs to look heavy and shapeless and have everyone's focus on your shiny tights, instead of all of you, the choice is yours.