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. - 
Answer: A
You might also like to view...
Solve the problem.The number of employees of a company, N(t), who have heard a rumor t days after the rumor is started is given by the logistic equation 
How many employees have heard the rumor 12 days after it is started?
A. 60 employees B. 68 employees C. 75 employees D. 7 employees
Solve the problem.A beverage wholesaler wants to create a new punch. He will mix fruit juice worth $5 a gallon and rum worth $10 a gallon. He wants to obtain 135 gallons of punch worth $7 a gallon. How much of each beverage should he use?
A. 94.5 gal of juice; 40.5 gal of rum B. 81 gal of juice; 54 gal of rum C. 108 gal of juice; 27 gal of rum D. 121.5 gal of juice; 13.5 gal of rum
Write the expression in lowest terms.
A. 1 B. - 2 C. 2 D. -1
Divide and simplify.
÷ 
A. 
B. 
C. 
D. z + 10