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
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Use the order-of-operations agreement to simplify.
÷ 
A. - 
B. - 
C. 0
D. - 
Mathematics
Subtract.(+25) - (-4)
A. -29 B. 21 C. -21 D. 29
Mathematics
Evaluate the expression, if possible.81-5/4
A. - 
B. 
C. 243
D. not a real number
Mathematics
State whether the statement is true or false.
?
The test point 
satisfies the inequality 
.
What will be an ideal response?
Mathematics