Sunday, November 28, 2010

tori michelleee.

Im gonna go over section 11.1 because thats the only one i rememberrr.

In this section we learned how to convert polar to rectangular and how to convert polar to rectangular. To do this, you must know the following formulas:to convert to rectangular--x=rcos(theta) y=rsin(theta)to convert to polar--r=square root of x^2 + y^2 tan(theta)= y/x(r,(theta)) - polar form(x,y) - rectangular
Example 1:Give the polar point for (1,1)r=square root of 1^2 + 1^2 = 1
*first you use the polar formulatan(theta)= 1/1 = 1
*use tan(theta) y/xtheta=tan^-1(1) = 45
*find the inverse*
because tan is positive, find where tan is positive on the trig chart.
it is positive in quadrant 1 and 3 so your answers are 45 and 225
so you gett, (1, 45) ; (-1, 225)

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