Which of the following is a correct trigonometric identity? A
sin(x + y) = sin x cos y + sin x sin y
B
cos(x + y) = cos cos y
sin sin y
С
cos(x – y) = cos z sin y + cos z sin y
D
sin(x-y) = sin x cos y + cos x sin y

Which of the following of the following sets of side lengths could not form a triangle?

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label?