Use an identity to write the expression as a single trigonometric function or as a single number.
A. sin 22°
B. cos 22°
C. tan 22°
D. cot 22°
Answer: D
Mathematics
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Find the convergence set for the given power series.
A. x < 10 B. 8 ? x < 10 C. -10 < x < 10 D. 8 < x < 10
Mathematics
Use a half-angle formula to find the exact value of the expression.sin 
A. 
B. 
C. - 
D. - 
Mathematics
Find the amount of sales tax or tax rate and the total cost. Round money answers to the nearest cent if necessary.Amount of sale: $380 Amount of tax: $34.20
A. 0.9%, $414.20 B. 11%, $414.20 C. 10%, $414.20 D. 9%, $414.20
Mathematics
Multiply. Assume that all variables represent non-negative real numbers.(3 + 
)(5 - 
)
A. 15 - 3
+ 
- 
B. 15 - 3
+ 5
- 
C. 
- 3
+ 5
- 
D. 35 - 3
+ 5
Mathematics