Polygon QRST below was dilated by a scale factor of 9/5 to create polygon Q'R'ST.​

Find the value of the cosine for angle a

Asap describe the transformations required to obtain the graph of the function f(x) from the graph of the function g(x). f(x)=-5.8sin x. g(x)=sin x. a: vertical stretch by a factor of 5.8, reflection across y-axis. b: vertical stretch by a factor of 5.8,reflection across x-axis. c: horizontal stretch by a factor of 5.8, reflection across x-axis. d: horizontal stretch by a factor of 5.8 reflection across y-axis.

Which of the following are accepted without proof in a logical system? check all that apply.