Verify that each equation is an identity.cos(4?) = cos4 ? - 6 sin2 ? cos2 ? + sin4 ?
What will be an ideal response?
cos(4?) = cos[2(2?)] = cos2(2?) - sin2(2?) = 
= cos4 ? - 6 sin2 ? cos2 ? + sin4 ?
Mathematics
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Perform the following operation with real numbers.2 - 3
A. –5 B. 5 C. 1 D. –2 E. –1
Mathematics
Solve the problem.In a chemical reaction, the rate at which the amount of a reactant changes with time is proportional to the amount present, such that 
, when t is measured in hours. If there are 
of reactant present when t = 0, how many grams will be left after 
? Give your answer to the nearest tenth of a gram.
A. 3.7 g B. 0.1 g C. 11.2 g D. 7.5 g
Mathematics
Find u + v.
Mathematics
Divide using synthetic division.(p2 + 2p - 11) ÷ (p + 5)
A. p - 3
B. p - 4 + 
C. p + 3 + 
D. p - 3 + 
Mathematics