Find an equivalent expression with the given denominator.
; 21x
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Provide an appropriate response.For approximately what values of x can cos x be replaced by 
with an error of magnitude no greater than 
?
A. |x| < 0.42628 B. |x| < 0.51435 C. |x| < 0.57462 D. |x| < 0.35944
Mathematics
Determine if the equation is an identity.tan 
= cot x
A. No B. Yes
Mathematics
Multiply.(8x + 3y)2
A. 8x2 + 48xy + 9y2 B. 8x2 + 9y2 C. 64x2 + 9y2 D. 64x2 + 48xy + 9y2
Mathematics
Solve the equation.
a - 
= -3
A. -5 B. 7 C. 5 D. -7
Mathematics