Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.cos ? = - 
, ? < ? < 
Find cos 
.
A. - 
B. 
C. 
D. - 
Answer: A
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Solve the problem.One Internet service provider has the following rate schedule for high-speed Internet service:Monthly service charge$18.001st 50 hours of usefreeNext 50 hours of use$0.25/hourOver 100 hours of use$1.00/hourWhat is the charge for 50 hours of high-speed Internet use in one month?What is the charge for 75 hours of high-speed Internet use in one month?What is the charge for 135 hours of high-speed Internet use in one month?
Fill in the blank(s) with the appropriate word(s).
Find a rectangular equation for the plane curve defined by the parametric equations.x = 5 tan t, y = 2 sec t; 0 ? t ? 2?
A. 
+ 
= 1; for x in -? < x < ?
B. y = 2
; for x in -? < x < ?
C. y = x2 - 9; for x in -3 ? x ? 3
D. 
- 
= 1; for x in -? < x < ?
Use Euler's method to approximate the indicated function value to three decimal places using 
= 
; y(0) = 2; find y(0.3)
A. 2.015 B. 2.005 C. 2.030 D. 2.024
?Solve the system of linear equations
using an inverse matrix.
A. ?
B. ?
C. ?
D. ?
E. ?