Triangle DEF has vertex coordinates D(0, -3), E(-1,0), and F(-2,-1). It is reflected across the y-axis. What are the coordinates of D'EF?

Provide an example of a trigonometric function and describe how it is transformed from the standard trigonometric function f(x) = sin x, f(x) = cos x, or f(x) tan x using key features.

The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9

Select the correct answer. what is the exact value of sin (157.5°)? a. 'sqrt(2 - sqrt(2))/2 b. *"-"'sqrt(2 + sqrt(2))/29 c.'sqrt(2 + sqrt(2))/4" d. "-"sqrt(2 + sqrt(2))/4)