Section+4.3


 * Circular Functions 4.3**

Review: Ex. Place a 130° angle in standard form: picture of graph::[|130 pic.docx]


 * __Coterminal Angles__:** Two angles with same initial and terminal side.

pic of graph:: [|225 graph.docx]

Ex., Find positive and negative angles that are coterminal with the given angles.

a) 30° = -330°, 390° b)-150° = -510°, 210° c)2pi/3 = 8pi/3, -4pi/3 remember common denominators

Ex. Let theta be the acute angle in standard position whose terminal side contains the point (5,3) find the 6 trig functions of theta. pic of graph::[|3 5.docx]

Ex. Terminal side goes through (-4,-7).

Pic of graph::[|74.docx]

Ex. 6 trig functions of 315°.

pic of graph::[|-1 1.docx]


 * SIGN CHART**

graph of sign chart::[|sign chart.docx]

Ex. Find the acute angle that has the same trig values (disregarding sign) a 10,000°.

pic of graph::[|problem 1.docx]

Ex. Find: sec (-3pi/4)

pic of graph::[|problem 2.docx]


 * __Quadratic Angles__:** Angles whose terminal side lies along one of the axes.


 * UNIT CIRCLE**

pic of circle::[|unit_circle.gif]

HOMEWORK-Pg. 381 #1-23 ODDS