Use the reference angle to find the exact value of the expression. Do not use a calculator.sin 
A. - 
B. -1
C. 
D. - 
Answer: A
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Solve.Recall that 
is the formula for the area of a square. If the area of a square is represented by 
how can the length of each side be represented?
A. (x - 3)2 B. (x + 3)2 C. x - 3 D. x + 3
Rewrite the quadratic function in standard form by completing the square.f(x) = x2 - 18x
A. f(x) = (x + 9)2 - 9 B. f(x) = (x - 18)2 - 324 C. f(x) = (x + 18)2 - 18 D. f(x) = (x - 9)2 - 81
Solve.For a certain species of bird, it's weight W in kilograms is related to it's length L in meters of its wing span, as given by the formula W = 1.6L2. If a bird has a wing span of 4 meter, estimate it's weight.
A. 2.500 kg B. 25.6 kg C. 6.4 kg D. 1.581 kg
If possible, evaluate the expression at the given value of the variable.
, x = 5
A. 
B. - 
C. 429
D. Undefined