Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.csc ? = 
, 
< ? < ?Find cos(2?).
A. - 
B. 
C. 
D. - 
Answer: D
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Let u represent src="https://sciemce.com/media/4/ppg__ttt0701190814__f1q108g7.jpg" style="vertical-align: -17.0px;" /> 
, v represent 
, and w represent 
. Solve first for u, v, and w. Then solve the system of equations. 
+ 
- 
= 
- 
- 
= - 
- 
+ 
+ 
= 
A. 
B. (-3, 1, 8)
C. 
D. (-3, 1, -8)
Solve the problem.Find all points of the graph of f(x) = 2x2 + 2x whose tangent lines are parallel to the line y - 38x = 0.
A. (9, 180) B. (10, 220) C. (0, 0) D. (11, 264)
Find the reciprocal of the expression.
A. 
B. 
C. 
D. 
Find the domain and range of the inverse of the given function.f(x) = 5 - x2 ; x ? 0
A. Domain and range: all real numbers B. Domain: (-?, 5]; range: range: [0, ?) C. Domain: all real numbers; range: (-?, 5] D. Domain: all real numbers; range: [-5, ?)