Complete the identity.(4 sin ? cos ?)(1 - 2 sin2 ?) = ?
A. 
B. sin (2?) cos (2?)
C. sin (2?) + cos (2?)
D. sin (4?)
Answer: D
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Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.sec ? = - 
, 
< ? < ?Find sin 
.
A. - 
B. - 
C. 
D. 
The future value of an annuity due is determined one period after the first cash flow in the series.
Answer the following statement true (T) or false (F)
For which of the following transactions would the present value of an annuity due concept be most appropriate for calculating the present value of the asset acquired or liability assumed?
A. A rental agreement is entered into with the initial payment due immediately. B. A rental agreement is entered into with the initial payment due one month from the signing of the agreement. C. A note payable is obtained from a bank requiring monthly payments for six years, beginning at the end of the current month. D. A machine is acquired by paying $20,000 cash and agreeing to pay equal annual amounts of $10,000 each at the end of the next three years.
Which type of research study is a "compromise" that examines a number of different age groups over several points in time?
A. longitudinal B. sequential C. cross-sectional D. experimental