Find the phase shift of the function.y = -5 cos 
A. 
units to the right
B. 
units to the left
C. 4 units down
D. 4 units up
Answer: B
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Use reference angles to find the exact value of the expression. Do not use a calculator.tan 
A. - 
B. 
C. 
D. 
Solve the problem.If m?y = 109° in the following figure, find the measures of ?w, ?x, and ?z. 
A. m?w = 109°, m?x = m?z = 71° B. m?w = -19°, m?x = m?z = 71° C. m?w = 71°, m?x = m?z = 109° D. m?w = 109°, m?x = m?z = -19°
The graph of a linear function f is shown. Write the equation that defines f. Write the equation in slope-intercept form.
A. y = x - 1 B. y = -x - 1 C. y = x + 1 D. y = -x + 1
Solve the problem.The radius r of a circle of known area A is given by r = 
, where 
Find the radius and circumference of a circle with an area of 48.71 sq ft. (Round results to two decimal places.)
A. r = 15.52 ft, C = 97.52 ft B. r = 3.94 ft, C = 8.86 ft C. r = 3.94 ft, C = 24.76 sq ft D. r = 3.94 ft, C = 24.76 ft