Find the exact value of the expression.cos 
cos 
- sin 
sin 
A. 0
B. 1
C. -1
D. 
Answer: A
Mathematics
You might also like to view...
Multiply.(4 - 6i)2
A. 16 - 84i B. -20 - 48i C. 52 - 48i D. 16 - 12i
Mathematics
Solve the system of equations using substitution.
A. x = 3, y = -2; x = -3, y = 4 or (3, -2), (-3, 4) B. x = -1, y = 2; x = 5, y = -4 or (-1, 2), (5, -4) C. x = 2, y = -1; x = -4, y = 5 or (2, -1), (-4, 5) D. x = -2, y = 3; x = 4, y = -3 or (-2, 3), (4, -3)
Mathematics
Solve the system, if possible.
A) x = –6, y = 1, z = –3
B) x = 6, y = –1, z = 3
C) x = 5, y = 8, z = –3
D) x = 0, y = 6, z = –3
E) no solution; inconsistent system
Mathematics
Find the vertex, and directrix of the parabola. : y² + 2y - 12x + 37 = 0
 figure 1.png)
Mathematics