If you have a 200 question test how many can i miss to get atleast a d?

What basic trigonometric identity would you use to verify that sin x cos x tan x =1-cos^(2)x?

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.

The sum of two numbers is 12 and their difference is 18 what are the two numbers