Complete the identity.2 tan ? - (1 + tan ?)2 = ?
A. 0
B. -sec2 ?
C. 1 - sin ?
D. 1
Answer: B
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Jeff desires to accumulate $13,603.83 by December 1, 2018. To accumulate that sum, he will make six equal semiannual deposits of $2,000, beginning on June 1, 2016, into a fund that earns interest compounded semiannually. What annual rate of interest must the fund provide to yield the desired sum?
A. 5% B. 6% C. 10% D. 12%
Provide an appropriate response.Evaluate 
Fill in the blank(s) with the appropriate word(s).
Find the exact value of the expression.sin (tan-1 2)
A. 2
B. 
C. 
D. 5
Simplify the expression.4 sin ? cos3 ? - 4 sin3 ? cos ?
A. sin 2? cos 2? B. 4 sin ? cos ? C. sin 4? D. 4 sin ? cos ? cos 2?