Use even and odd properties of the trigonometric functions to find the exact value of the expression.cos 
A. 
B. - 
C. 
D. - 
Answer: C
Mathematics
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Express the number in scientific notation.18,000,000
A. 1.8 x 106 B. 1.8 x 10-6 C. 1.8 x 10-7 D. 1.8 x 107
Mathematics
Find the limit.
sin-1 x
A. -1
B. - 
C. 
D. 1
Mathematics
Use Cramer's rule to solve the system. x + 2y - 3z + w = 7 3x + 4y - z + 2w = 4-2x + y + z - w = -3 x - y + 2z - 2w = 1
A. 
B. 
C. 
D. 
Mathematics
Graph the function.y = 
sin (x + ?)
A. 
B. 
C. 
D. 
Mathematics