osborne83 osborne83
  • 15-01-2020
  • Mathematics
contestada

sin x = -1/2, and the cos y = √3/2. if angle x is in the fourth quadrant and angle y is in the first quadrant, the value of cos(x-y) is

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shaleenparikh1
shaleenparikh1 shaleenparikh1
  • 15-01-2020
x is 11pi/6 and y is pi/6. So cos(10pi/6) = cos(5pi/3)=1/2. 1/2 is the answer
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