Find the product of the complex number and its conjugate.
- 2i
A. 
+ 4i
B. 
C. 
D. 
- 4i
Answer: C
Mathematics
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Find the indicated trigonometric function, given that ? is an angle in standard position with the terminal side passing through the given point.(12, 16); Find sin ?.
A. 
B. 
C. 
D. 
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Determine whether the number is prime, composite, or neither.2
A. Neither B. Composite C. Prime
Mathematics
Find the constant of proportionality k, and write the linear function relating the two variables.Suppose that y is inversely proportional to x. When x = 24, then y = 
.
A. k = 72; y = 72x
B. k = 8; y = 
C. k = 8; y = 
D. k = 
; y = 
Mathematics
Find the exact value by using a half-angle identity.sin 22.5°
A. 
B. - 
C. 
D. - 
Mathematics