Solve the problem.The formula Z = R sec ? gives the impedance Z (in ohms) in an ac circuit with resistance R (in ohms) and phase angle ? (in radians). Find the average value of Z for an 76.1-? resistor as ? ranges from ?/8 radians to ?/3 radians.
A. 69.5 ?
B. 106.2 ?
C. 139 ?
D. 132.6 ?
Answer: B
Mathematics
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Provide an appropriate response.Use a calculator to find cos 0.1250. Round to four significant digits.
Fill in the blank(s) with the appropriate word(s).
Mathematics
Find the exact value of the expression or state that it does not exist.tan(cos-1 1)
A. 
B. 
C. 0
D. -1
Mathematics
Calculate the effective annual rate for an investment that earns 7.5% interest compounded quarterly. Round to the nearest hundredth of a percent.
a. 7.71% b. 7.69% c. 7.76% d. 7.64% e. 7.50%
Mathematics
Determine whether the given point (x,y) is on the unit circle.
A. No B. Yes
Mathematics