Solve the problem.If f(?) = cot ? and f(a) = -6, find the exact value of f(-a).
A. 
B. - 
C. 6
D. -6
Answer: C
Mathematics
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Solve the problem.Find an equation of the circle that passes through the points (4, 6), (-6, 2), and (1, -3).
A. 
2 + 
2 = 
B. 
2 + 
2 = 
C. 
2 + 
2 = 
D. 
2 + 
2 = 
Mathematics
What is a triangle with three sides of equal length called?
A. right B. scalene C. equilateral D. isosceles E. none of these
Mathematics
Solve the given trigonometric equation analytically (using identities when necessary for exact values when possible) for values of x for 0 ? x < 2?.sec 
= cos 
A. 0
B. 0, 
, ?, 
C. 
, 
, 
, 
, 
, 
, 
D. 
, 
Mathematics
State whether the triangles are congruent. If the information given is not sufficient, state "No conclusion possible".
?
39 in78 in
A. No conclusion possible B. Not congruent C. Congruent
Mathematics