Find the exact value of the expression.cos 
cos 
+ sin 
sin 
A. 1
B. 
C. 
D. 
Answer: C
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Find the extreme values of the function subject to the given constraint.
A. Maximum: 1 at 
minimum: -1 at 
B. Maximum: 8 at 
minimum: -8 at 
C. Maximum: 9 at 
minimum: -9 at 
D. Maximum: 1 at 
minimum: -1 at 
Multiply or divide. Simplify, if possible. Assume all variables and radicands represent nonnegative real numbers.
(
+ x
)
A. 
+ x
B. x + 
C. 45x
D. 15 + x
Use a graphing calculator to find the sum.
Round your answer to three decimal places.
A. 0.917 B. 1.100 C. 0.091 D. 0.063
Solve the problem.The voltage v (in volts) induced in a tape head is given by 
where t is the time (in seconds). Find the average value of v over the interval from t = 0 to t = 3. Round to the nearest volt.
A. 16 volts B. 6502 volts C. 1100 volts D. 71,327 volts