Answer:
A=.666666(repeated) because 28/42=.666666 and 14/21=.66666
B= 6 by 3 because 42x1/7=6 and 21x1/7=3
Step-by-step explanation:
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12 * 10% = 1.20
12 - 1.20 = 10.80
10.80 * 8% = 0.864
10.80 - 0.864 = 9.936
The total price of this CD, including tax, is: $9.94
Answer:B
Step-by-step explanation:it's a vertex, and those can't be functions.
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If A is QIV, then 3π/2 ≤A≤2π;
we have to find out in what quadrant is A/2
(3π/2)/2≤A/2≤(2π)/2 ⇒ 3π/4≤A/2≤π
We can see that A/2 will be in QIII; therefore the sec (A/2) will be negative (-).
1) we have to calculate cos (A/2)
Cos (A/2)=⁺₋√[(1+cos A/2)/2]
We choose this formula: Cos (A/2)= -√[(1+cos A/2)/2], because sec A/2 is in quadrant Q III, and the secant (sec A/2=1/cos A/2) in this quadrant is negative.
Cos (A/2)=-√[(1+cos A)/2]=-√[(1+(1/2)]/2=-√(3/4)=-(√3)/2.
2) we compute the sec (A/2)
Data:
cos (A/2)=-(√3)/2
sec (A/2)=1/cos (A/2)
sec (A/2)=1/(-(√3)/2)=-2/√3=-(2√3)/3
Answer: sec (A/2)=-(2√3)/3
