Determine the phase shift of the function.y = 3 cos 
A. 
units to the left
B. 
units to the right
C. 
units to the left
D. 
units to the right
Answer: A
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Use a calculator to evaluate the expression, or state that the value does not exist. Round the answer to four decimal places when necessary.tanh-1 4
A. does not exist B. 0.9993 C. 0.2554 D. 1.0007
Find the exact value of the expression.sin 260° cos 20° - cos 260° sin 20°
A. - 
B. - 
C. 
D. - 
Find the area of the triangle. If necessary, round the answer to two decimal places.A = 30°, b = 13, c = 9
A. 52.66 B. 29.25 C. 50.66 D. 27.25
Solve the problem.If x dollars is deposited every four weeks (13 times a year) into an account paying an annual interest rate r, expressed in decimal form, then the amount An in the account after n years can be approximated by the formula 
If $30 is deposited every four weeks into an account paying 4% interest, approximate the amount in the account after 19 years.
A. $23,985.00 B. $11,073.88 C. $369.13 D. $5195.59