Use an identity to find the value of the expression. Do not use a calculator.sin2 20° + cos2 20°
A. 0.20
B. 0.04
C. 1
D. 0
Answer: C
Mathematics
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Answer the question.What is the only real number not in the domain of f(x) = 
?
A. 0 B. 3 C. -3 D. x - 3
Mathematics
Write the shaded area in the figure as a mixed number and as an improper fraction.
A. 4
; 
B. 4
; 
C. 3
; 
D. 3
; 
Mathematics
Determine whether the relation is also a function.{(-3, -7), (-2, 6), (-1, 1), (-1, -8)}
A. yes B. no
Mathematics
Solve the system of linear equations by the method of elimination. Use the graph to check your solution.
?
?
?
A. (-1, 0)?
?
?
B. ?(0, 1)
?
?
C. (10, 1)
?
?
D. ?(1, 10)?
E. ?(1, 0)
?
?
Mathematics