x-coordinate y-coordinate x-coordinate y-coordinate θ (estimate) (estimate) (exact) (exact) 30o 150o 210o 330o Notice that all of your angles so far have a reference angle of 30o. Use a calculator to verify your conclusions for cos 30° and sin 30°. Use your calculator to find trig values of other angles. Based on these relationships, on the unit circle, x = _____________ and y = _____________. This is a special case of the general trigonometric where r = 1. coefficients (rcosθ, rsinθ) Part II Now, look at the angles on the unit circle that have 45o reference angles. What are let’s these angle measures?
θ x-coordinate (estimate) y-coordinate (estimate) x-coordinate (exact) y-coordinate (exact) 30o 150o 210o 330o Notice that all of your angles so far have a reference angle of 30o. Use a calculator to verify your conclusions for cos 30° and sin 30°. Use your calculator to find trig values of other angles. Based on these relationships, on the unit circle, x = _____________ and y = _____________. This is a special case of the general trigonometric coefficients (rcosθ, rsinθ) where r = 1. Part II Now, let’s look at the angles on the unit circle that have 45o reference angles. What are these angle measures?