Solve the problem.A vibrating wire has a vertical displacement given by 
Assume b and t are constants. Write y as a cosine function of x.
A. y = cos(2?x - bt)
B. y = 6 cos(2?x - bt)
C. y = 6 cos(2?x + bt)
D. y = 12 cos(2?x + bt)
Answer: B
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If the compound interest rate on an investment is small, then the value of the investment will never grow very fast.
Answer the following statement true (T) or false (F)
Solve.
- 
= 
A. 42 B. 14 C. 28 D. -14
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.cos ? = - 
, 
< ? < ?Find cos(2?).
A. - 
B. 
C. - 
D. 
A student is studying mathematics and chemistry. The probability that he passes mathematics is 0.75, the probability that he fails chemistry is 0.2, and the probability that he passes mathematics but fails chemistry is 0.05.Find the probability that he passes both courses.
A. 0.70 B. 0.75 C. 0.60 D. 0 E. none of these