Use a table or a calculator to evaluate the function. Round to four decimal places.cos 0.1209
A. 0.1206
B. 0.9927
C. 1.0074
D. 0.1215
Answer: B
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Perform the indicated operations. Write the result in the form a + bj.
2
A. -32 + 126j B. 32 + 126j C. 32 + 2j D. 32
Graph the system of linear inequalities and indicate the solution set.4x - y ? -4x + 4y ? -16
A. 
B. 
C. 
D. 
Solve the problem.The sound produced by touching each button on a touch-tone phone is described by y = sin 2?lt + sin 2?htwhere l and h are the low and high frequencies (cycles per second) in the figure shown.
Describe the sound emitted by touching the 0 key as a product of sines and cosines.
A. y = 2 sin(536?t) cos(2418?t) B. y = 2 sin(395?t) cos(2277?t) C. y = 2 sin(2418?t) cos(536?t) D. y = 2 sin(2277?t) cos(395?t)
Use quotient identities to find the indicated function value.cos ? = 
, tan ? = 
; find sin ?
A. 
B. 
C. 
D. 