Use a half-angle formula to find the exact value of the expression.cos 
A. - 
B. 
C. 
D. - 
Answer: B
Mathematics
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Answer the question.What function is the reciprocal of sin ??
A. cos ? B. tan ? C. csc ? D. sec ?
Mathematics
Simplify the difference.(4y - 4) - (y + 10)
A. 4y + 6 B. 3y + 6 C. 3y - 14 D. 4y - 14
Mathematics
Use an amortization table to find the value.
A. 0.10397 B. 0.10826 C. 0.10916 D. 0.10745
Mathematics
Find all cube roots of the complex number. Leave answers in trigonometric form.-6
- 6i
A. 
cis 70°, 
cis 190°, 
cis 310°
B. 
cis 70°, 
cis 190°, 
cis 310°
C. 
cis 70°, 
cis 190°, 
cis 310°
D. 
cis 80°, 
cis 200°, 
cis 320°
Mathematics