Complete the equation so the result is an identity. (sec x - tan x)(sec x + tan x) = ___
A. -1
B. sec2x + tan2x
C. sec2x + 1
D. 1
Answer: D
Mathematics
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Simplify.
-2
A. 
B. 16x6
C. 
D. 
Mathematics
Find the function value.Find f(a - 3) when f(x) = x2 + 2.
A. a2 - 6a + 11 B. a2 + 9 C. a2 - 1 D. a2 - 6a + 9
Mathematics
Simplify.
A. 13 B. 84 C. 14 D. Not a real number
Mathematics
Solve the inequality, then graph the solution.3x ? - 48
A. (-?, -16]
B. [16, ?)
C. [-16, ?)
D. (-?, 16]
Mathematics