Prove the identity.cos 4x = 1 - 2 sin2 2x
What will be an ideal response?
cos 4x = cos2 2x - sin2 2x = 1 - 2 sin2 2x.
Mathematics
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Identify the number as rational or irrational.37.773
A. Irrational B. Rational
Mathematics
Does the problem involve permutations or combinations? Do not solve.In a student government election, 5 seniors, 3 juniors, and 
sophomores are running for election. Students elect four at-large senators. In how many ways can this be done?
A. permutations B. combinations
Mathematics
Find the limit.
cos 
A. -1
B. 1
C. 
D. 0
Mathematics
Convert the units.0.92 L = 
mL
A. 0.092 mL B. 920 mL C. 0.00092 mL D. 92 mL
Mathematics