Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.tan ? = 
, ? < ? < 
Find cos 
.
A. 
B. - 
C. 
D. - 
Answer: B
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Solve the problem.Select an appropriate graph of a twice-differentiable function y = f(x) that passes through the points src="https://sciemce.com/media/4/ppg__tttt0611190923__f1q50g6.jpg" style="vertical-align: -20.0px;" />
, (0, 0), 
and (
, 1), and whose first two derivatives have the following sign patterns.y' : 
y":
A. 
B. 
C. 
D. 
Write a chain rule formula for the following derivative.
for u = f(p, q); p = g(x, y, z), q = h(x, y, z)
A. 
= 
B. 
= 
+ 
+ 
C. 
= 
+ 
D. 
= 
+ 
Solve the problem.When making a telephone call using a calling card, a call lasting 6 minutes cost $2.00. A call lasting 13 minutes cost $3.75. Let y be the cost of making a call lasting x minutes using a calling card. Write a linear equation that models the cost of a making a call lasting x minutes.
A. y = -0.25x + 3.5 B. y = 4x - 22 C. y = 0.25x - 9.25 D. y = 0.25x + 0.5
Provide an appropriate response.The payoff table for three possible courses of action A1, A2, and A3 is given below.pi?A1xi?A2xi?A3xi?.3$70$40$50.2$100$120$110.1$160$140$90.4$80$140$160Which course of action will produce the largest expected value? What is it?
What will be an ideal response?