Establish the identity.sin 
= cos x
What will be an ideal response?
sin 
= sin x cos 
+ sin 
cos x = (sin x)(0) + (1)(cos x) = cos x.
Mathematics
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Perform the division.
A. z2 + 3z - 9 B. z2 + 3z + 9 C. z2 - 3z + 9 D. z2 + 6z + 9
Mathematics
Decide whether or not the functions are inverses of each other.f(x) = 
, g(x) = 
A. Yes B. No
Mathematics
Solve the inequality.
> 
A. ? B. (-9, ?) C. (-?, -9) D. (-?, ?)
Mathematics
Solve the system of equations using Cramer's Rule if it is applicable. If Cramer's Rule is not applicable, say so.
A. x = 6, y = 1, z = 6; (6, 1, 6) B. x = 4, y = -6, z = -1; (4, -6, -1) C. x = 4, y = 6, z = 1; (4, 6, 1) D. x = 5, y = 4, z = 1; (5, 4, 1)
Mathematics