Use the appropriate sum or difference identity to write the given expression as a function of x alone.cos
A. 
B. 
(cos x - sinx)
C. -
(sin x - cos x)
D. 
Answer: D
You might also like to view...
Graph the polar equation.r = 6 sin 2?
A. 
B. 
C. 
D. 
Decide whether the given statement is always true or not always true.A ? (B ? C)' = A ? (B' ? C')
A. Not always true B. Always true
Write the phrase as a mathematical expression. Use x as the variable.The product of a number and 29
A. x + 29
B. 29x
C. 
D. 29(x + 29)
Solve the problem.A piece of land is shaped like a right triangle. Two people start at the right angle of the triangle at the same time, and walk at the same speed along different legs of the triangle. If the area formed by the positions of the two people and their starting point (the right angle) is changing at 
then how fast are the people moving when they are 
from the right angle? (Round your answer to two decimal places.)
A. 1.33 m/s B. 4.50 m/s C. 0.67 m/s D. 0.33 m/s