Find the exact value of the expression.sin 20° cos 40° + cos 20° sin 40°
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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The point P(x, y) on the unit circle that corresponds to a real number t is given. Find the values of the indicated trigonometric function at t.
?Find sin t.
A. 
B. - 
C. - 
D. - 
Mathematics
Solve the polynomial equation in the complex numbers. x4 + 5x3 - 2x2 - 18x - 12 = 0
A. {-1, 3, -3 + 
, -3 - 
}
B. {-1, -2, -3 + 
, -3 - 
}
C. {1, -2, -3 + 
, -3 - 
}
D. {-1, 2, -3 + 
, -3 - 
}
Mathematics
Multiply or divide as indicated. Write the answer in lowest terms.1
? 3
A. 7
B. 3
C. 13
D. 6
Mathematics
Write the ratio of length to width of a standard index card as a decimal. Express your answer to the nearest hundredth.
Fill in the blank(s) with the appropriate word(s).
Mathematics