Verify the identity.cos 4x = 2 cos2 2x - 1
What will be an ideal response?
cos 4x = cos [2(2x)] = 2 cos2 2x - 1
You might also like to view...
Write the equation as an equivalent exponential equation.log3 
= -4
A. 
4 = 3
B. 381 = 4
C. 3-4 = 
D. 43 = 
Evaluate the expression without using a calculator.log10 
A. -
B. - 
C. 
D. 
Find the median for the given sample data.The normal monthly precipitation (in inches) for August is listed for 20 different U.S. cities. Find the median of the data.
A. 3.45 in. B. 3.50 in. C. 2.94 in. D. 3.40 in.
Describe the transformations that produce the graph of g from the graph of f.f(x) = 
; g(x) = 
- 12
A. Stretch horizontally by a factor of 
. Shift it 12 units down.
B. Shift it 11 units to the left and 12 units up.
C. Stretch vertically by a factor of 12 and shift it 11 units to the right.
D. Shift it 11 units to the left and 12 units down.