Question: 13 Use an Addition or Subtraction Formula to write the expression as a COMBINED trigonometric function of one number and then find its exact value

13 Use an Addition or Subtraction Formula to write the expression

13 Use an Addition or Subtraction Formula to write the expression as a COMBINED trigonometric function of one number and then find its exact value Round to 2 decimal places if needed LOS 3T 27 21 7 3 sin sin 7 COS 27 21 tan tan 18 1 tan kla kla TT tan 18

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