Solve the problem.The voltage E in an electrical circuit is given by E = 7.7 cos 180?t, where t is time measured in seconds. Find the period.
A. 
B. 90?
C. 
D. 90
Answer: C
Mathematics
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Match the function with its graph.1) y = sin (x)2) y = cos (x)3) y = -sin (x)4) y = -cos (x)A)B)
?
C)D)
?
A. 1C, 2A, 3B, 4D B. 1B, 2D, 3C, 4A C. 1A, 2D, 3C, 4B D. 1A, 2B, 3C, 4D
Mathematics
Provide an appropriate response.Find the standard form of the equation of the line passing through the two points. (2, - 6) and (- 9, 6)
A. 12x + 11y = - 42 B. 8x - 15y = - 18 C. - 12x + 11y = - 42 D. - 8x + 15y = - 18
Mathematics
Find the term indicated in the expansion.(x - 2y)11; 8th term
A. 21,120x7y4 B. -42,240x7y4 C. 21,120x4y8 D. -42,240x4y7
Mathematics
The given pattern continues. Write down the nth term of the sequence {an} suggested by the pattern.1, 
, 
, 
, ...
A. an = 
B. an = 
C. an = 
D. an = 
Mathematics