Determine if the following is an identity.cos x csc x tan x = 1
A. Not an identity
B. Identity
Answer: B
Mathematics
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Solve the problem.A 200 gal tank is half full of distilled water. At time = 0, a solution containing 1 lb/gal of concentrate enters the tank at the rate of 4 gal/min, and the well-stirred mixture is withdrawn at the rate of 
When the tank is full, how many pounds of concentrate will it contain?
A. 100 pounds B. 200 pounds C. 120 pounds D. 150 pounds
Mathematics
Solve. x + 2y + 2z = 0 4y + 2z = 2 z = -5
A. {(4, 3, -5)} B. {(-5, 3, 4)} C. {(4, -5, 3)} D. {(-5, 4, 3)}
Mathematics
Graph the polar equation.r = 2 - 2 cos ? 
A. 
B. 
C. 
D. 
Mathematics
List all the elements of B that are elements of the given set.B = {16, 
, -19, 0, 
, 
} Whole numbers
A. 16, -19, 0
B. 16, 0
C. 16, -19, 0, 
D. 16, 0, 
, 
Mathematics