Write the expression as the sine, cosine, or tangent of a double angle. Then find the exact value of the expression.cos2 22.5° - sin2 22.5°
A. 
B. - 
C. - 
D. 
Answer: D
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Solve the problem using the table.Monthly Principal and Interest Payment per $1000 of Mortgage
Justin Lowery is buying a condominium that sells for $130,000. The bank is requiring a minimum down payment of 15%. To obtain a 20-year mortgage at 9.0% interest, Justin must pay 3 point(s) at the time of closing. What is the cost of the 3 point(s) on the mortgage?
A. $3315.00 B. $3900.00 C. $3489.47 D. $9945.00
Simplify.
- 
+ 
A. 
B. 
C. 
D. 
Show that the equation is not an identity by finding a value of x for which both sides are defined but not equal.sin x - sin x cosx = sin3 x
A. ?
B. 
C. 
D. 0
State whether the given quantity is typically measured using only positive numbers or if both positive and negative numbers are used.Weight of some luggage
A. Positive B. Both