Express the sum or difference as a product of sines and/or cosines.cos(4?) + cos(2?)
A. 2 sin(3?) sin ?
B. 2 cos(3?) cos ?
C. 2 cos(3?) sin ?
D. 2 cos(3?)
Answer: B
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A hypothesis test is to be performed. State the null and alternative hypotheses.At one school, the average amount of time that tenth-graders spend watching television each week is 
The principal introduces a campaign to encourage the students to watch less television. One year later, the principal wants to perform a hypothesis test to determine whether the average amount of time spent watching television per week has decreased.
A. Null hypothesis: mean time = 21.6 hours Alternative hypothesis: mean time < 21.6 hours B. Null hypothesis: mean time = 21.6 hours Alternative hypothesis: mean time ? 21.6 hours C. Null hypothesis: mean time < 21.6 hours Alternative hypothesis: mean time = 21.6 hours D. Null hypothesis: mean time > 21.6 hours Alternative hypothesis: mean time < 21.6 hours
Solve the inequality and give the solution set in set builder notation.
? 0
A. {x| 1 < x ? 5} B. {x| 1 ? x ? 5} C. {x| x < 1 or x ? 5} D. {x| x ? 5}
Solve the equation.47x = 64
A. x = 
B. x = 
C. x = 64
D. x = 81
Verify the identity.
- 
= 4 cot x csc x
What will be an ideal response?