Use the identities for the cosine of a sum or a difference to write the expression as a single function of ?.cos (? - 180°)
A. -sin ?
B. cos ?
C. sin ?
D. -cos ?
Answer: D
Mathematics
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Rationalize the denominator and simplify.
A. 
B. 
C. 
D. 
Mathematics
Solve the equation and express the solution in exact form using either ln or log as indicated.4-x = 
Express the answer using ln.
A. 
B. 
C. 
D. {-ln 4}
Mathematics
Sketch the graph of the function and its inverse on the same coordinate axes.f(x) = 2x + 4 
A. 
B. 
C. 
D. 
Mathematics
Solve the equation using the quadratic formula.2x2 + 5x = 0
A. 
, 0
B. 0
C. - 
D. ± 
Mathematics