Establish the identity.cos4 x = 
(3 + 4 cos(2x) + cos (4x))
What will be an ideal response?
cos4 x = cos2 x cos2 x = 
2 = 
(1 + cos(2x))2 = 
(1+ 2 cos(2x) + cos2(2x)) = 
= 
( 3 + 4 cos(2x) + cos(4x)).
Mathematics
You might also like to view...
Use logarithmic differentiation to find the derivative of y.y = 
A. 
B. 
C. 
(lnx - ln(x + 7))
D. 
Mathematics
Solve and check. Note that the equation could be an identity or a contradiction.12n + 2(n - 3) = 11 + 5(2n - 1)
A. 
B. 6
C. - 
D. 3
Mathematics
Solve the problem.On a sunny day, a flag pole and its shadow form the sides of a right triangle. If the hypotenuse is 
long and the shadow is 40 meters, how tall is the flag pole?
A. 30 m B. 90 m C. 64 m D. 100 m
Mathematics
Solve the inequality. Graph the solution set and write the solution set in set-builder notation.(x - 9)(x + 3) > 0
A. {x 
B. {x 
C. {x 
D. {x 
Mathematics