Express the sum or difference as a product of sines and/or cosines.sin(10?) + sin(4?)
A. 2 sin(7?) cos(3?)
B. 2 sin(14?)
C. 2 cos(7?) sin(3?)
D. 2 sin(7?) sin(3?)
Answer: A
You might also like to view...
Find the area of the region specified in polar coordinates.the region inside both 
and 
A. 
(? - 1)
B. 
(? - 2)
C. 
(? - 1)
D. 
(? - 2)
Solve the equation.
(9x - 15) = 
(10x - 6)
A. 
B. -1
C. -15
D. 1
Solve the problem.An accountant tabulated a firm's profits for four recent years in the following table: The accountant then fit both a linear graph and an exponential curve (seen below) to the data, in order to estimate future profits. Use the exponential graph to estimate the profits in the year 2001.
A. About $300,000 B. About $750,000 C. About $1,000,000 D. About $1,300,000
Solve the problem.Consider the quadratic model h(t) = -16t2 + 40t + 50 for the height (in feet), h, of an object t seconds after the object has been projected straight up into the air. Find the maximum height attained by the object. How much time does it take to fall back to the ground? Assume that it takes the same time for going up and coming down.
A. maximum height = 50 ft; time to reach ground = 2.5 seconds B. maximum height = 75 ft; time to reach ground = 2.5 seconds C. maximum height = 75 ft; time to reach ground = 1.25 seconds D. maximum height = 50 ft; time to reach ground = 1.25 seconds