Use a calculator to verify the value found by using the double-angle formulas.Find cos 
directly and by using functions of 
.
A. 0.809
B. 0.309
C. 1.618
D. 0.9511
Answer: B
Mathematics
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Use the partial sum formula to find the partial sum of the given arithmetic sequence.Find the sum of the first 41 terms of the arithmetic sequence {5n + 1}.
A. 4243.5 B. 4346 C. 4489.5 D. 4633
Mathematics
Find all points where the function is discontinuous.
A. None B. x = 2 C. x = 4 D. x = 4, x = 2
Mathematics
Divide.
A. 8x2 + 5 + 
B. 8x2 + 5 + 
C. 8x + 5 + 
D. 8x + 5 + 
Mathematics
Solve. Jennifer is building some shelves and requires 4 pieces of wood that are each 1
feet long. What is the total length of wood that Jennifer needs?
A. 6 feet
B. 5
feet
C. 8 feet
D. 4 feet
Mathematics