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).
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Use the Half-angle Formulas to find the exact value of the trigonometric function. sin 165°
A. 
B. 
C. - 
D. - 
On June 1,2016, Molser Company acquired a new machine by agreeing to pay five equal annual payments of $20,000, with the first payment due that day. Assuming an interest rate of 14% compounded annually, Molser should record the acquisition cost of the machine as
A. $68,662. B. $78,274. C. $87,719. D. $100,000.
When cultural factors affect a particular individual at a particular time, and include forces such as ethnicity, social class, and subcultural membership, these factors are called what?
A. age-graded influences B. non-normative life events C. history-graded influences D. sociocultural-graded influences
On January 2, 2016, Christopher inherited a trust fund that he could use for college tuition. Christopher hopes to make five equal withdrawals of $40,000 each year for the next five years from the fund that will earn 10% compounded annually. The first withdrawal will be made on January 2, 2017. How much does he need to have invested in the fund on January 2, 2016, to be able to withdraw the needed amounts each year?
A. $151,631 B. $200,000 C. $244,204 D. $268,624