Actividad 1) Calcular: Sen (x+y) + Sen (x-y) 2) Calcular: Cos (x+y) - Cos (x-y) 3) Calcular: 1\2 [Cos (A+B) + Cos (A-B) 4) Si Sen x= 3/5, Sen y= 1/3, Cos x= 3/13 y Cos y= 5/13 Calcula: Sen (x+y) y Sen (x-y) 5) calcular: Sen (60°+x) +Sen (60°-x) dividido/ Cos x 6) Si tan 45°= 1 y Tan 37°=3/4. Calcular: Tan 8° y Tan 82°

The total cost of anja’s trip to the dentist was $628.35. she paid a flat fee of $89.95 which included the checkup and cleaning and then had 4 cavities filled, each of which cost the same amount. which shows the correct equation and value of x, the cost of each cavity filling?

Find the coordinates of point x that lies along the directed line segment from y(-8, 8) to t(-15, -13) and partitions the segment in the ratio of 5: 2.

Assume that there is a 11% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?