Determine whether the relation is a function.{(2, 2), (2, 10), (5, -9), (8, 5), (10, 5)}
A. Function
B. Not a function
Answer: B
Mathematics
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Find the exact value of the trigonometric function. Do not use a calculator or tables.cos 
A. - 
B. 
C. - 
D. 
Mathematics
Use the Half-angle Formulas to find the exact value of the trigonometric function. cos 
A. - 
B. 
C. - 
D. 
Mathematics
Which of the following are true?
(a) All squares are rhombi. (b) All rectangles are parallelograms. (c) All parallelograms with congruent diagonals are rectangles. (d) All rhombi with congruent diagonals are squares. (e) Both (a) and (b) are correct. (f) Answers (a)–(d) are all correct.
Mathematics
Answer the question.List all numbers that must be rejected as possible solutions.
+ 
= 
A. 
, 
B. 0, 
, 
C. 0, 
, 
, 17
D. 
, 
, -17
Mathematics