Verify the identity.sin 
= -cos ?
What will be an ideal response?
sin 
= sin 
cos ? - cos 
sin ? = (-1) ? cos ? - 0 ? sin ? = - cos ?
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Add or subtract as indicated. Make sure that your answer is reasonable by estimating first.15.460 - 11.907
A. 3.553 B. 3.653 C. -3.553 D. 27.367
Calculate how much change will be returned.How much change will you get back from a $10 bill if you pay for an item that is $6.08?
A. $16.08 B. $4.92 C. $3.92 D. $13.92
Use the roster method to identify the elements of the set.The letters needed to spell these words:toot, tot, too, to
A. {t,o} B. {t,t,o} C. {t,t,o,o} D. {t,o,o}
In the exercise below, the initial substitution of x = a yields the form 0/0. Look for ways to simplify the function algebraically, or use a table and/or graph to determine the limit. When necessary, state that the limit does not exist.
A. Does not exist B. 20 C. 1 D. 10