Establish the identity.cos 
= -sin x
What will be an ideal response?
cos 
= cos x cos 
- sin x sin 
= (cos x)(0) - (sin x)(1) = - sin x.
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Tessa won the lottery for $2,500,000 but due to a change in state laws she will not be able to collect it for three years. Ralph is willing to give her a lump sum today in return for the payment in three years. If current interest rates are 14% per year, how much will Tessa receive today?
A. $1,687,430 B. $5,804,080 C. $2,500,000 D. $3,703,860
Use the given stock table to answer the question.Based on the fact that stocks historically trade at an average P/E ratio of about 12-14, does the stock price of company ABC seem cheap, about right, or expensive right now? 
A. about right B. expensive C. cheap
Provide an appropriate response.The relative change in the investment value is the ______.
A. complete return B. total return C. annual return D. None of the above
Use the Half-angle Formulas to find the exact value of the trigonometric function. cos 165°
A. - 
B. 
C. 
D. - 
