Simplify.i9
A. -i
B. i
C. 1
D. -1
Answer: B
Mathematics
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Rationalize the denominator.
A. 
B. 
C. 
D. 
Mathematics
Determine i) the domain of the function, ii) the range of the function, iii) the domain of the inverse, and iv) the range of the inverse.f(x) = 
A. f(x): D is all real numbers, R is all real numbers;
f-1(x): D is all real numbers, R is all real numbers
B. f(x): D = {x|x ? 1}, R = {y ? 0};
f-1(x): D = {x|x ? 0}, R = {y|y ? 1}
C. f(x): D is all real numbers, R = 
;
f-1(x): D = 
, R is all real numbers
D. f(x): D = 
, R = 
;
f-1(x): D = 
, R = 
Mathematics
Solve.x2 - 49 = 48x
A. x = -7, 7 B. x = -1, 49 C. x = 0, -7 D. x = 1, -49
Mathematics
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.cos ? = - 
, csc ? < 0Find cos(2?).
A. 
B. - 
C. 
D. 
Mathematics