Complete the identity.cos (? + ?) + cos (? - ?) = ?
A. sin ? cos ?
B. 2cos ? cos ?
C. 2sin ? cos ?
D. cos ? cos ?
Answer: B
Mathematics
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Find the distance between the pair of points. Give your answer in exact form and where appropriate find an approximation to three decimal places.(3, -2) and (7, -4)
A. 12
? 20.785
B. 6
C. 2
? 4.472
D. 12
Mathematics
Solve the equation.log4 
= x
A. 3
B. 
C. 
D. -3
Mathematics
Use properties of logarithms to condense the logarithmic expression. Write the expression as a single logarithm whose coefficient is 1. Where possible, evaluate logarithmic expressions.
(log4 (r - 4) - log4 r)
A. log4 
B. log4 
C. log4 
D. log4 
Mathematics
Give the equation of the horizontal asymptote, if any, of the function.h(x) = 
A. y = 0
B. y = 
C. y = 
D. no horizontal asymptotes
Mathematics