population to reach 500 60 Given tan a 3 Sin Aa and both a

population to reach 500. (60 Given tan a 3, Sin A-a, and both a & B are in QI find: (a) sin(a +B) (7) A car engine runs at a temperature of 1 when it isturned off it cools accordingtoNewon with constant k 0.0341, with the time measured in minutes. Find the time needed or heengne he surrounding temperature is 60°F

Solution

tan alpha=1/2          sin beta=2/3

b. cos 2beta= 1-2sin²beta =1-2(2/3)²= 1-2(4/9)

                                                     = 1-8/9=1/9