Calculate the unit vector u = (cos ?)i + (sin ?)j for the given direction angle.? = 
A. - 
i + 
j
B. - 
i - 
j
C. 
i - 
j
D. 
i + 
j
Answer: A
Mathematics
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Graph the given number, its negative, and its complex conjugate one the coordinate grid.-3 - 5j
A. 
B. 
C. 
D. 
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Divide. Express your answer in simplest form.
÷ 
A. 
B. -1
C. 
D. 
Mathematics
Use synthetic division to find the quotient and the remainder.(2x5 - x4 + 3x2 - x + 5) ÷ (x - 1)
A. Q(x) = (2x4 + x3 + 4x2 + 3x); R(x) = 8 B. Q(x) = (2x4 + x3 + x2 + 4x + 3); R(x) = 8 C. Q(x) = (2x4 - 3x3 - x); R(x) = 6 D. Q(x) = (2x4 + x3 - x2 + 2x + 1); R(x) = 6
Mathematics
Complete the identity.sin 
= ?
A. -cos x B. sin x C. cos x D. -sin x
Mathematics