Solve the problem.Given the approximation cos 40° ? 0.77, use trigonometric identities to find the approximate value of sin 
If necessary, round the answer to two decimal places.
A. 1.31
B. 0.84
C. 0.64
D. 0.77
Answer: D
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Sketch the indicated set. Describe the boundary of the set. Finally, state whether the set is open, closed or neither.{(x, y) : 1 < (x - 2)2 + y2 ? 3}
A. 
The boundaries are two circles, one of
radius 1 and the other of radius 3, both
centered at (2, 0). The set is neither closed or open.
B. 
The boundary is the circle of radius 3
centered at (2, 0). The interior is the
set of all points within the circle.
The set is open.
C. 
The boundary is the circle of radius 1
centered at (2, 0). The interior is the set
of all points within the circle.
The set is closed.
D. 
The boundaries are two circles, one of
radius 1 and the other of radius 3, both
centered at (2, 0). The interior is the set
of all points in between the two circles.
The set is closed.
Which of the following is a defining theme of AP Statistics?
a. Exploring data b. Sampling and experimentation c. Anticipating patterns d. Statistical inference e. All of the above
Use a calculator to evaluate the function. Round your answer to 4 decimal places.cos 
A. 0.9999 B. 0.9397 C. 0.4083 D. 0.3420
Write as a fraction in simplest form.350%
A. 
B. 35
C. 
D. 7