Decide whether or not the given equation is an identity.2 cos2 
csc x = csc x + tan x
A. Yes
B. No
Answer: B
Mathematics
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Evaluate the expression.(-7)2
A. -14 B. -49 C. 14 D. 49
Mathematics
Solve the problem.A closed cubic box has the property that the sum of its volume (in cubic inches) and surface area (in square inches) is exactly 
Find the length of a side of the box.
A. 2.0753 in. B. 2.2075 in. C. 2.2076 in. D. 2.4075 in.
Mathematics
Determine whether the argument is valid or invalid by using a truth table.p ? qp ? r----? ~ r ? q
A. 
The argument is valid.
B. 
The argument is invalid.
C. 
The argument is invalid.
D. 
The argument is invalid.
Mathematics
Calculate.89 + (-68)
A. -21 B. 157 C. -157 D. 21
Mathematics