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    • Question

      Calculate the value of sin120 o  + cos180

      o  + tan225 o .
      A 1/2 Correct Answer Incorrect Answer
      B 1 Correct Answer Incorrect Answer
      D √3/2 Correct Answer Incorrect Answer

      Solution

      sin120 o  + cos180 o  + tan225 o
      = sin(90 + 30) o  + cos180 o  + tan(180 + 45) o
      = cos30 o  + cos180 o  + tan45 o
      = √3/2 + (-1) + 1 = √3/2

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