Find the vertex, focus, and directrix of the parabola.
?
?
A. Vertex: (0,0); Focus: 
; Directrix: 
B. Vertex: (0,0); Focus: 
; Directrix: 
C. Vertex: (0,0); Focus: 
; Directrix: 
D. Vertex: (0,0); Focus: 
; Directrix: 
E. Vertex: (0,0); Focus: 
; Directrix: 
Answer: A
Mathematics
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Differentiate the function.r(t) = (cot t)i + (csc t)j
A. r'(t) = (sec2 t)i + (tan t sec t)j B. r'(t) = (-csc2 t)i - (cot t csc t)j C. r'(t) = (-sec2 t)i - (tan t sec t)j D. r'(t) = (csc2 t)i + (cot t csc t)j
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Solve the problem by integration.Find the volume generated by rotating the area bounded by 
and 
about the 
A. 
? ln 
B. 
? ln 
C. 
? ln 
D. 
? ln 
Mathematics
Solve.Divide: 
A. 
+ 
i
B. 
+ 
i
C. 
- 
i
D. 
- 
i
Mathematics
Evaluate using any method.
Mathematics