Solve the problem.Does the graph of the function y = tan x - x have any horizontal tangents in the interval 
If so, where?
A. No
B. Yes, at x = 0, x = ?, x = 2?
C. Yes, at x = 
, x = 
D. Yes, at x = ?
Answer: B
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?Which of the following is true about similar polygons?
A. ?If a and a', b and b', c and c', etc. are corresponding sides, then ak = a', bk = b', ck = c', etc. B. ?If the polygons are similar, then the perimeter of one polygon is kP, where k is the constant of proportionality and P is the perimeter of one polygon. C. ?If the polygons are similar, then the perimeter of one polygon is knP, where k is the constant of proportionality, P is the perimeter of one polygon, and n is the number of sides of the polygon. D. ?a and b are true. E. ?a and c are true.
Find the circumference of the circle whose radius or diameter is given. Use 
or 
as indicated. r = 161 cm Use ? ? 
.
A. C ? 1012 cm B. C ? 253 cm C. C ? 81,466 cm D. C ? 506 cm
Solve the problem.Find the supplementary angle to ? = 7°.
A. 173° B. 187° C. 367° D. 83°
The point P(x, y) on the unit circle that corresponds to a real number t is given. Find the values of the indicated trigonometric function at t.
?Find cos t.
A. - 
B. - 
C. 
D. 