Use the addition formulas:
?
?
to express 
in terms of 
.
?
A. 
B. 
C. 
D.
E. 
Answer: D
Mathematics
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Identify the name of the angles labeled in the figure.
A. Complementary angles B. Alternate interior angles C. Corresponding angles D. Alternate exterior angles
Mathematics
Find the exact value of the expression.cos 40° cos 20° - sin 40° sin 20°
A. 
B. 
C. 
D. 
Mathematics
Write a formula for a linear function f whose graph satisfies the conditions.Slope: - 
; y-intercept: 8
A. f(x) = - 
x - 8
B. f(x) = - 
x + 8
C. f(x) = 
x - 8
D. f(x) = 
x + 8
Mathematics
Use the multiplication principle to solve the equation.k ? 
= 
A. 
B. 
C. 
D. 
Mathematics