Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
4.2--Day 3---Domain and Period of Sine and Cosine What you should learn: To evaluate trigonometric functions using the unit circle, to use domain and period to evaluate sine and cosine functions, and use a calculator to evaluate trigonometric functions. Why you should learn it: Trigonometric functions have many real-world applications. Domain and Period of Sine and Cosine The domain of sine and cosine functions is the set of _____ _________ ___________. Which means we can put any value in for θ. Why is that? The range are the values we get out which depend on our unit circle since all the angle values occur in the unit circle. From our unit circle: Since in a unit circle we can say Therefore for Sine and Cosine: Domain: Range: We know that the sine and cosine values repeat every 2π or 360o. Because this happens we say that these functions are ____________. The ________ is the degree or radian value it takes before the cycle starts to repeat itself. Sine and Cosine are periodic and their period is _____. The other 4 trig functions are periodic also, but we will look at them later. 1 EX: Evaluate ( if possible)use the period of sine and cosine to help EX: Evaluate (if possible) the six trigonometric functions of the real number. EX: Use a calculator to evaluate the expression. Round to four decimal places. MODE ON CALCULATOR!!! HW: p. 377 1337 odd, 4553 odd = 18 problems Try to figure problems out without looking at unit circlejust use special triangles and converting to degrees 2