Posted by Joe on Wednesday, December 2, 2009 at 1:53pm.
Sorry ok I was talking about on the unit circle how come the slope of the reference line (say if you were to angle pi/2, the reference line would be the positive y axis from y equals zero to y equals one, I think this line is called this, like if you were to draw pi/4 on the unit circle you would indicate this by drawing a line that is not on the circle arleady... this line is the line I'm referencing) how come the slope of this line or the first deriviative of it is equal to tangent
tan theta = (dsine(theta))/(dcos(theta))
???

Precalculus  Joe, Wednesday, December 2, 2009 at 1:54pm
tangent theta is equal to
the derivative of sine theta
over
the derivative of cosine theta?

Precalculus  bobpursley, Wednesday, December 2, 2009 at 2:52pm
I think you are greatly confused.
The slope of any line at an angle theta from the reference line is equal to tangent theta.
tangenttheta is NOT equal to derivative of sin over the derivative of cosine.
Why is slope equal to tangent?
slope is defined as deltaY/deltax where x is the reference point for the angle. but deltaY/deltaX is by definition the tangent of the central angle, theta.
Answer This Question
Related Questions
 PreCalculus  Ok I know that the slope of a straight line is the same thing as x...
 MATH!  What type of lines have a slope of zero? Write the equation of a line ...
 trig question  On a unit circle, sin x = square root 3 over 2, with center O. ...
 trig question  NEW DIAGRAM: On a unit circle, sin x = square root 3 over 2, ...
 MATH PLEASE  can a reference angle be negative? Tye "reference angle" in google...
 Science  A straight line with a positive slope on a velocitytime graph ...
 Trig  I'm confused on how to determine what the end result angles are for a ...
 maths  128 degrees has a reference angle of what? It depends. Where zero is is...
 math  Can someone please check my work?? 16. The bigger the number the slope is...
 math  Find the slope and the intercepts of each line. g(x)=54x1 x=3 Help ...
More Related Questions