- #1
fonz
- 151
- 5
I just wanted to clear a couple of things up in terms of strict mathematical definition...
Is the correct definition of the trigonometric ratios:
cos[itex]\varphi[/itex]=[itex]\frac{|x|}{r}[/itex], sin[itex]\varphi[/itex]=[itex]\frac{|y|}{r}[/itex]
as opposed to:
cos[itex]\varphi[/itex]=[itex]\frac{x}{r}[/itex], sin[itex]\varphi[/itex]=[itex]\frac{y}{r}[/itex]
(note the lack of absolute value definition for the axis projections)
Also, is it correct to define a circle with the equation:
r = rcos[itex]\varphi[/itex]+rsin[itex]\varphi[/itex]?
Thanks
Is the correct definition of the trigonometric ratios:
cos[itex]\varphi[/itex]=[itex]\frac{|x|}{r}[/itex], sin[itex]\varphi[/itex]=[itex]\frac{|y|}{r}[/itex]
as opposed to:
cos[itex]\varphi[/itex]=[itex]\frac{x}{r}[/itex], sin[itex]\varphi[/itex]=[itex]\frac{y}{r}[/itex]
(note the lack of absolute value definition for the axis projections)
Also, is it correct to define a circle with the equation:
r = rcos[itex]\varphi[/itex]+rsin[itex]\varphi[/itex]?
Thanks