Complete the identity.sin (4?) sin (7?) cos (4?) cos (7?) = ?
A. cos2 (56?)
B. 
C. 
D. 
Answer: D
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Complete the identity.sec (? + ?) sec (? - ?) = ?
A. 
B. 
C. 
D. sec2? - sec2 ?
Use the Half-angle Formulas to find the exact value of the trigonometric function. sin 22.5°
A. - 
B. 
C. 
D. - 
Use the compound interest formula for compounding more than once a year to determine the accumulated balance after the stated period.$3000 deposit at an APR of 3% with monthly compounding for 6 years
A. $3045.28 B. $3590.85 C. $11,444.09 D. $2872.68
Orbitwheels are a cross between a skateboard and pair of inline skates. Riders insert each foot in a large wheel that rotates sideways. Orbitwheels differ from a skateboard in that they are self-propelled by the rider's wave-like motion so the need to push off the ground every few feet to get moving is eliminated. The product has been popular among some kids, especially athletic teen boys. Athletic teen boys could be described as the ________ for Orbitwheels.
Fill in the blank(s) with correct word