Decide whether the expression is or is not an identity.sin (A + B) sin (A - B) = sin2A - sin2B
A. Identity
B. Not an identity
Answer: A
Mathematics
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Write the function shown in the graph as a transformation of r(x) = 
.
A. y = -
- 3
B. y = -
+ 3
C. y = 
- 3
D. y = -
Mathematics
Factor.t2 + 0.2t - 0.15
A. (t + 0.1)2 B. (t + 0.15)(t - 1) C. (t + 0.5)(t - 0.3) D. (t - 0.5)(t + 0.3)
Mathematics
Find the exact value of y, or state that y is undefined.y = csc-1(1)
A. 2?
B. 
C. 
D. ?
Mathematics
?If X is an exponential random variable with the probability density function 
, find E(X).
?
A. ?10
B. ?5
C. ?
D. ?
E. ?1
Mathematics