Verify the identity.cos 4x = cos4 x - 6 sin2 x cos2 x+ sin4 x
What will be an ideal response?
cos 4x = cos [2(2x)] = cos22x - sin22x = 
= cos4 x - 6 sin2 x cos2 x + sin4 x
You might also like to view...
By graphing the function 
and zooming in toward the point where the graph crosses the y-axis, estimate the value of 
What will be an ideal response?
Solve the problem.A deep sea diving bell is being lowered at a constant rate. After 8 minutes, the bell is at a depth of 300 ft. After 50 minutes the bell is at a depth of 2000 ft. What is the average rate of lowering per minute? Round to the nearest hundredth is needed.
A. 40.0 ft per minute B. 40.5 ft per minute C. 0.02 ft per minute D. 34.0 ft per minute
Determine if the number is a solution to the equation.3(x - 1) - x = 4x + 3; x = -3
A. Yes B. No
Find the median.Cost of cellular phones: $92, $28, $212, $118, $275, $243, $240
A. $212 B. $118 C. $173 D. $240