Express the sum using summation notation. Use 1 as the lower limit of summation and i for the index of summation.3 + 6 + 9 + . . . + 27
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Find the angle between u and v in radians.u = 9i - 9j - 7k, v = 3i + 7j - 6k
A. 1.57 B. 1.53 C. 0.04 D. 1.55
Mathematics
Give the degree measure of ?.? = cot-1 
A. 150° B. 30° C. 300° D. 210°
Mathematics
Use the given information to find the exact value of the trigonometric expression.tan ? = 
; ? < ? < 
Find cos(2?).
A. 
B. - 
C. - 
D. 
Mathematics
Determine whether the function is odd, even, or neither.f(x) = 15x
A. Neither B. Even C. Odd
Mathematics