Use the Half-angle Formulas to find the exact value of the trigonometric function. sin 22.5°
A. - 
B. 
C. - 
D. 
Answer: D
Mathematics
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Find the interval of convergence of the series.
A. 7 < x < 9 B. x < 12 C. 4 < x < 12 D. -12 < x < 12
Mathematics
Find the slope of the polar curve at the indicated point.r = 1 - sin ?, ? = 0
A. 
B. -1
C. 2
D. 
Mathematics
Find the center and graph the hyperbola.
- 
= 1
A. C(- 2, -1)
B. C(2, -1)
C. C(2, 1)
D. C(0, 0)
Mathematics
Simplify.
A. -1
B. 1
C. 
D. 
Mathematics