Use the sum and difference identities to evaluate exactly.cos 
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Rewrite with positive exponents, and simplify, if possible.7x-6/7z7/8
A. 
B. 
C. 
D. 
Mathematics
Find the derivative of the function.y = 
A. y ' = 
B. y ' = 
C. y ' = 
D. y ' = 
Mathematics
Decide whether or not the ordered pair is a solution to the equation.3x + y = 14; (4, 2)
A. No B. Yes
Mathematics
Determine the degree measure of the given angle.
A. 150° B. 60° C. 120° D. 30°
Mathematics